Wingnut, thanks for the tip on Raptor Archery, I'll contact Ted.
Soilarch, I know Craig W. and have spoken to him in the past about his Bow Bolt and retrofitting. You're right, he doesn't offer that service and apparently there aren't many that do for that system.
Bill, I haven't asked Craig E. about a sleeve retrofit but haven't heard that he's done any, nor does he doesn't mention it on his website. I'd think he wouldn't provide that service simply because it could detract from his new TD sales...i.e., probably not a good business move for him.