A lot of the reason it's not repoped is because the ROI just isn't there or worth the hassle on the small production runs. Sure a Hemi 6 x 2 Weiand Drag Star is $1000+, but even at $500, how many new ones could they sell in a year-a couple hundred? A big Co. could probably pour a few with the left over alloy at the end of a production run rather than set up to do hundreds that would be shelved for an extended period. Offenhauser used to stock about every damn piece they ever offered. They were doing very small runs of obscure Stude, Cad, etc. intakes and valve covers. There was an article on this way back in (perhaps the mid-late 70's) Street Rodder or Rod Action. Not sure if they still offer their catalog or even can (do they still cast domestically)? Something that might work is a limited production exclusive contract run. Someone with deep pockets would contract/purchase an exclusive run. Example; Speedway contracts Edelbrock for a run of 500 manifolds of a model that hasn't been produced in 50 years. Speedway is now the exclusive vendor and when the 500 are gone, that's it.. AMT has done this with old model car tooling. They'll dust off an old tool and run 10,000 kits for an independent Co. or hobby shop. It's typically a model that hasn't been produced in decades. It's subject matter for niche/specialty markets (hard core model car enthusiasts) not the general public model car kit buying builder..