I went to the Mancester show in the fall. There was a small table selling sand boas, they said they should be back in the spring. If you go to the New England Reptile Expo website you can look at vendor websites and see if anyone has them.
I want to get one soooo much!
Have you looked for other local expos? There are usually a several local ones and one or two big ones a year in most places.
If you can find a breeder close by but not 100% local, you may be able to meet half way or something. That or if it's too far of a drive, shipping will be cheaper.