www.bphobbies.com also has Dynam vortex parts........ Jamie at boomtown hobbys is well versed and his products are very well liked thruout the CX/CX2 community.
The site you originally mentioned is a total ripoff. the canadian based company is easliy double the price for the parts that can be had from REPUTABLE online vendors with less hassle. Deal with whoever you like, just research the prices before you commit and you will always come out a winner! Good choice asking in these forums before giving away your hard earned cash!
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Of all the things I ever lost....................................... I miss my mind the most!