Hi again pwindsurf,
I finally made it home from the work trip I was on out in Calif.
I have 2 sets of "Starbilizer " side fins.
One set if got a G0 200 and the other set looks like it's for a
smaller GO and the smaller set was mfg. in 2005.
If you want them, send me a private email and we can
negoitate a price and get the shipping details worked out.
I also have a set of the 23 mm long screws I'm pretty sure.
Hope this helps,
P.S. I think the '04 and '05 GO boards had very similar
rail shapes so I would expect these side fins to be a good fit.