Track pad not working correctly

My track-pad doesnt work correctly. THe left and right hand side of the track-pad do not respond as normal. They dont work i rub my finger against it and it wont respond.

The middle works as normal but the sides dont. Shall i get it repaired or is this normal?

Has anyone else had it repaired before?

Also where can i get the rurber stands that are at the bottom of my powerbook? Two have following off