I didn't know about that, sorry. This is obviously a reason to be worried about but my colleague told me yesterday about his order last year where everything went ok. Maybe he had luck (?)

Kris, try to Google this one:
Globalmediapro M-203 Shotgun Condenser Microphone (cca 90 euros)
If all written about it is true (meaning polar diagram, frequency response etc.) I think that you shouldn't look any further. There's another model of the same label which cost about 35 euros but I don't belive in its quality. M-203 is mono mike but I think it's OK because all ambiental noises and sound effects can be recorded separately later, even with built-in mike of your Camcorder.
The Idea for M-203 came from my job colleague on tonight's Political TV show which we worked together and during this long and boring Live session I have mentioned your problem. More people - more knowledge as you see but work on some Political TV shows are best suitable for exchange of experiences :-)

Expensive? I mean 300$ is really cheap for that kind of equipement, and slo the mic are certainly double or three times more expensive.

Thank you for the information :-)
A lot of people cannot effort some hi-tech and 1st class devices so it's good to know that cheaper solutions exists.

OK, I have to agree about it :-)
Maybe this story can help someone else with similar problems.
I've been thinking of something when I was on my job schedule past few hours. If you cannot find or borrow the cable somewhere in your nearness, I can send you one somehow because those cables are almost consumable goods here in Croatian TV so I can always pick one-a-month for my personal needs even my all cables are in good shape. That's only a small favor I can do to help desperate Wrecker friend :-)

Canon HG20? Nice little camcorder with good video quality. I still have my old Sony VX2100 :-(

So I see but also realize that you learn fast. You can always contact me for any technical help...maybe rather to find me on Facebook or Skype, just not to bother others on Wreckamovie with those technical difficulties correspondence.

(Sigh)
There are some very cheap cables (cost the same as e.g. two Burger meals) which quality is questionable but reasonable. When you buy a mike, you can ask a salesman for such a cable and if you tell him that you're out of money and that cable means your whole life, maybe the salesman will give you one as a store gift or discount. Just tell him that you need a cable with XLR female plug on the one side and 3.5mm stereo male plug on the other side of cable. What am I talking about?? The salesman knows everything :-)

So do I, Kris :-(
Croatia is still a country with small payments in a big-budget Europe but we learned how to manage the situation.
This device on upper pic is an old product of Sennheiser so I think you could find one in specialized Second Hand shops or maybe on Ebay and it should cost less than 200 euros I suppose.
The 2nd solution is, as you said, to buy a battery-powered microphone. In a range of some 200 euros I suggest Beyerdynamic MCE-72 CAM. Its quality is far better than some Sony models which cost a bit more and have a lot wider angle of sound catching which is not good for film&video production. And yes, it's a Stereo mike so you can use it as Mono in case of speech rec. or Stereo in case of getting atmosphere and music rec. Its shape is perfect for Boompole mounting. If you haven't a cable yet, I suggest Mogami cable with Neutrik jacks. You'll always find at least one Electro-freak who'll do that "scary" soldering job for you :-)