If the secret of the Remflex manifold gasket is its ability to squish in some areas, yet still seal in others, they should start making Remflex gaskets for warped Model B carburetors.
Jon (CarbKing) and I discussed that same idea a couple of years ago and decided maybe (a long maybe) the pvc gasket material available today might be adaptable or some gas-resistant variant of the rtv sealing material. We later agreed it might not be worth the time and expense, though. But I do think either of these might work.