Here are some of the cheaper options from tower, the hand crank pump is fine and always reliable.

http://www3.towerhobbies.com/cgi-bin...?&I=LXL370&P=0

http://www3.towerhobbies.com/cgi-bin...?&I=LXME71&P=0

http://www3.towerhobbies.com/cgi-bin...?&I=LXVZ40&P=0

http://www3.towerhobbies.com/cgi-bin...?&I=LXFAW2&P=M

http://www3.towerhobbies.com/cgi-bin...?&I=LXJ811&P=M

http://www3.towerhobbies.com/cgi-bin...?&I=LXK134&P=M

this one times 2 http://www3.towerhobbies.com/cgi-bin...?&I=LXK129&P=M

I run one filter at the pickup and one between my fuel pump and the plane I have seen tiny plastic bits come from electric pumps on the downside of life .

I use the electric pump all of the time but I have a hand crank one in the bottom of my field box I have loaned tons and had to use a few times myself.