By the looks of it there is nothing off the shelf for theses cars but lots of parts can be made to fit. Best thing is just to go though this site and read up on everything, some of the people on here have got some good power out of these little engines with just a uprated carb and new manifolds.
Had all the parts to do my ma10, had a nova inlet manifold (£30), a weber 34ich carb (£40) and a nova 4-2-1 manifold (£30).