When I had my first gen. Neon, I like so many others, was trashing the front motor mount from spirited driving, some h.p. and a 5 spd.
A company called "Deyeme Racing" was taking the factory mounts and filling the voids with his special mix of polyurethane. He started with a few and mainly did this on a exchange basis, charging for cores. The factory mount was open on both sides, just like the alternator mounts. Not sure if this would work in our case, but here is a link to his web site.
http://www.deyemeracing.com/products.asp
Travis did all the work, just sent him the old one. I think he made people wait until he had some cores to work with.