You are in luck with the gaskets for your 06 R1. The base gasket is the same as the 07 R1. I do have a base gasket in stock, I do not remember which thickness it is.
Additionally, Cometic gasket should have their EST .018" head gaskets available.
If your bike was a 2007 R1, The porting I have come up with for the 4 valve head works really well.
I have no interest in working with the 5 valve head. I personally can't even think of anyone I could recommend.
And yes, the GSXR is a better bike for a privateer. But, you run what ya got.