Yeah, ive tried quite a few options.. nothing. Its really quite a huge shame. This guy had a quite a variety of resin cockpit and even external detail upgrade sets for the egg planes. He was in Europe somewhere. His Harrier, F-16, and P-51 Interior upgrades were really cool. They kept the cartooony caricature proportions( by default of the plane's shape, they had to) while being pretty nicely detailed.
They really gave the otherwise naked and starkly spartan interiors of these kits, quite a visual kick in the pants.
He was the only one making them, so it's quite a huge bummer. I'm going to keep looking, and if I find a new link, I'll post it here for anyone interested.