2.0 BKD EGR O-Ring/gasket part numbers

[epidemic]

Hey all

I am hoping to clean my EGR / ASV soon however I am having trouble finding part numbers for the o rings / gaskets specifically for the BKD.
Can i reuse the old ones? I would like to replace however can't seem to find what i need.

Also does anyone know where to get the gasket for the EGR with the small hole in it? Does that do much? I read that it can help a bit with less exhaust and soot entering into the intake manifold.

Thanks in advance!