You may want to check out these Guys Precision just remember that on the 1200 page there is an arrow at the bottom to flick through all six pages just on the B110 early 1200 stuff.

Oh they also list every other model you are likely to come across and have prices on their site, Your Local spares guys or even mechanic could also source bits through them,Decent range and they give dimensions for some parts on the site and even torque settings etc, Though I would always confirm that sort of stuff just in case.
the link is page 6 so just go back to look at the rest or go to the Home page these guys do all sorts of goodies as well as spares for engines
http://www.precisionintl.com/Engine.a ... D=1292&EID=4760699&Page=6

Home Page.
http://www.precisionintl.com/Default.aspx