The the original poster, I feel that I am in the same boat and just want to extend my sympathy.
I have L carnitine and alpaha lipoic acid but I find that you guys discuss different kinds here on the forum. I hope I haven't wasted my money completely. I can't seem to find R lipoic acid in the health food stores
just a note - Inno-Vite makes a complex with Co q10, vit E, Carnitine, and vitamin C
Its quite expensive ($32 Canadian) my sister bought it for me as a gift. I took it for a while but didn't feel results so gave up and started on the alpha lipoic acid again.
Sigh...everything is so hit or miss isn't it. Good luck