I have the tambourine from the 1992 "Grand Ole Opry" (the new one) but I never had it signed. I wasn't trying to get it, I was simply being pulled away from Morrissey and clawing my way back. (We were a little more aggressive back then.)
He let go of the tambourine, and I went hurling backward, pulled offstage by Scummy Steve. Someone told me to hide it before people tried to pounce on me for it. I did (humorously) offer to give it back. (The offer still stands.)
I think the '91 tambourines had a red overlay, and they were much more sturdy. All of them that I know of were fully signed.