If you can find some of the older GT75/95's that spined .250, and some full length Easton XX75 2216's you should be good to go.
Gently heat the 2216 shaft with a heat gun, and then slide it over the carbon shaft. You have now in essence made a heavy FMJ style arrow. If the GT shaft is a little too short, it's ok because you will be using the 2216 insert.
If you can't find 32" 2216's, cheat out the last inch with a heated/glued footing of 2413 shafting over the 2216, and use 2413 inserts.