galant antenna problems.help please.

i bought a car from a wholesaler(kick me.i can't reach myself)and they advertised it saying it needed nothing.yeah right.they unplugged the power antenna because it wouldn't go up and down properly.the motor is fine(can here it running).just need the "mast",or the antenna itself.i found one after searching local junk yards.i'd have to do it myself of course.it looks like it might be difficult.any help much appreciated.