I picked up a pair of blingly quad lamps for the XR2

BUT

they have seen better days (but I saved a packet on em so was expeting it a bit) and there are a few extra screw holes in them where the originals were broken. Where the lamps are connected to they are cracked too.

Can all this be repaired?

I'm getting the holders painted to match the car anyway, is there a way of repairing the plastic too?