Has anyone replaced the rubber buttpad on a BM59 Paratrooper/Alpine folding stock?

[cowbilly]

Hello all, I have a near mint BM59 para folding stock that is new except it has a messed up rubber piece on the butt. It looks like it (or the housing for the rubber butt) is pinned into the top tube of the folding stock and the new piece I have (got it new from Standard Parts) looks like it will need to be drilled in order pin and replace it. Before I jumped into the project I wanted to see if anyone had done this before. I would hate to get western with it and tear something up. I have searched for schematics and "how to" but my searches turn up nothing on the paratrooper stock. I'm a long time member of the falfiles and akfiles-I was directed here for some advice.

Thanks in advance!