Those are even easier and cheaper to replace.
100 of those push button switches cost $2-$5
10 for a penny here: http://www.ebay.com/itm/10Pcs-Miniat...-/232051506456
Poplar Bluff shows a Radio Shack, they may have those switches, and there is a place called A-1 electronics that might fix that for you for a price of course.
This is assuming the switches are the problem, which, since these are the only moving parts on any remote, seems likely