http://www.futabarc.com/radioaccys/futm4150.html
http://www2.towerhobbies.com/cgi-bin...&I=LXANF2&P=ML

A little bit cheaper. Gonna be hard to find much cheaper and be of any quality.

Couldn't find instruction sheet. Reversing might not be mandatory and you could always just use other side of output wheel if installation would allow for that.