if you need a RHD rack, i have one sitting in the clip i got for my 20V swap still. i'd be willing to donate it
also you could look at a 84-87 RWD corolla. some of them had manual racks that are pretty thin. also Techno Toy Tuning has an adapter that allows you to use an 84-87 MR2 manual rack in those corolla's so i'm sure it can be adapted to your needs
i forgot to mention i saw a rack setup that uses the center links like you have posted in your pics in one of my latest superchevy or chevy high performance mags for camaro/nova. i gotta go find the add when i get home but i'll post a link if they have it.