this place has them too..... but its cheaper than QFM and bitmod1 at only $6. i think im going to order a 2 or so.
and if you want to try something different, try the new extreme motors 3.8, i havent heard much about them, but they say the EM 3.5 is faster than the bit mod1 3.5
Edit: yeah um heres the place that has it for $6 stores.andale.com/collectorsgarage
Edit #2: and here one for $1
http://cgi.ebay.com/ws/eBayISAPI.dll...&category=2565