I've been looking for the same thing - I'm even considering designing one myself. I've been looking at the Moths and International Canoes, and I'm starting to think that a 14 foot, 140 pound canted daggerboard planing cat might be a solution to the issue of reduced speed with reduced length on traditional cats. Semi-hard chine hull like a lengthened Moth hull. With carbon-reinforced Okoume and carbon beams/mast,I think it might be do-able.

I'll keep you updated if I get anywhere with it.

I would build a Paper Tiger before I built a Quattro.