If anyone is interested, I have a Doyle with Sovereign 350 back that I would be willing to trade for another Doyle with a common back. The card is not in that great condition, but it is presentable.
In return, I would either ask for an upgrade on the Doyle I have in terms of condition or the same condition Doyle but with common back plus addition of some T206 cards that I don't have (I don't have close to 300).
Email me at
SignedT206@gmail.com if you're interested in such a trade.