what boss kit do you have? most boss kits are compatible with many makes of steering wheels ie nardi, momo, autotecnica etc..

its strange how it doesnt fit unless the boss kit was specifically made for your wood grain make of steering wheel.

if it doesnt fit dude, just buy a new one, you can fit cheapies on ebay which go for $40 or so, does the job and are compatible with many wheels.

buy a new boss kit and sell your current boss kit + wood grain wheel n make your money back.