Hey there Lance. I've known a few guys that have tried compound releases with recurves (not sure about longbows) but the noise seems to be inherent. Have you tried some of the old-style artificial releases like a Bowlock? It's basically a solid piece of wood or plastic that is held with your fingers and has an edge that contacts the string. Relaxing the draw hand allows the string to slip off the edge...pretty simple. Not sure if anyone carries them now but they do work and are quieter than metallic modern releases.
I'm guessing you've already looked at some of the video tips hereabouts on getting a good release (improving back tension, push/pull, etc.)? Moeboe's posts/vids, as well as Terry Green's, offer some good visual info that you might be able to apply for your own situation. There are some good DVDs out there as well.
You've been coming here for a long time and I've liked your posts. If there's anything folks can do to help then I'm sure they/we will. Most of us have had TP at some point...some minor/temporary and others chronic and critically. Only one thing is certain about it. It IS beatable... with persistence and maybe a little thoughtful mentoring.
Don't give up, you CAN do it!