Just got a project on the go, got me an mgb roadster and want to either make a spit or buy one anyone used one of these... http://www.allertonclassics.co.uk/
Mine came off eBay for just under £100 delivered, though it has no wheels on it which isn't a problem for me.
Watch out with a roadster, make sure you brace the door gaps if you're going to lift it by the bumper mounts (which is how a lost of these spits work). Depends on how bad it is of course.