Just really getting started on a Jazzmaster build, and I'm already thinking of the next. I too was thinking of cutting my own from a Warmoth blank.
My main guitar for many years was a '65 Hagstrom H2, which is offset, but not so drastically as a JM or Jaguar. I was thinking of maybe a hybrid of the H2 shape and Fender radiused/contoured profile. The picture in the case is an SG case. Gives you an idea of how much its offset.