I think the part number is 028 109 127J. Mine's all chewed up with a hole worn through part of the plastic.

I could use the fasteners too.
Nobody has one of these to sell?
hahaha ive got two of them and they are worse than that. if you can't find one then a bit of fiberglass will fix er up, just do it on the backside of the cover away from the pulley.
I've been thinking about what I can use to patch this one since nobody seems to have one they want to part with.