I don't think that should be too much of a problem. Blood was based on the build engine, and a 3dfx patch was made for it. Now, it only worked with the voodoo1 (not voodoo2 or others), and I don't think glide wrappers worked for it. However, the patch wasn't too large, and it still allowed software mode.
As far as I know, the Blood source is owned by Infogrammes, and they've no plans to release it.