comm stick ?"S
#2

Wal-mart sells them in the automotive section, like less than $7.00
#3

LRP makes one:
p/n LRP 6546
p/n LRP 6546
#4
Tech Master
iTrader: (4)

I am not sure exactly which kind you are looking for but here is the one I use and it works great, http://www2.towerhobbies.com/cgi-bin...&I=LXUE64&P=ML First I use the trinity comm pen then this the combo seems to work good