WTB: T206 Frank Chance Yellow Port. Back Variations

[Harford20]

I am putting together a back variation set of the "super print" of the T206 Frank Chance, Yellow Portrait. I have acquired 8 different back over the past 2 years, and have confirmed the existance of 12 other backs (although these were either higher grades or out of my price range at the time). The backs I currently have are :
T206 Frank Chance, Yellow Portrait:
1. Piedmont 350, Fact 25
2. Sweet Caporal 350, Fact 30
3. Piedmont 350-460, Fact 25
4. Sweet Caporal 350-460, Fact 30
5. Sweet Caporal 350-460, Fact 42 OP
6. Old Mill, Fact 25
7. Polar Bear
8. Tolstoi

I am now asking if anyone has any other back variation, to include just simple Factory variations, they would be willing to sell. With the 12 I have confirmed, and the 6 that I believe are in the "super print" backs, I am still missing 18 different backs.
If you are not selling, but can confirm the existance of the AB 350, AB 460, Broadleaf 350, Cycle 460, Piedmont 350-460, Fact 42, or brown Lenox--that information would also be greatly appreciated

I am looking at PSA 1/SGC 10 (complete cards due to the back emphasis) to PSA 4/SGC 50, but also raw cards considered. With the incredibly rare backs (red Hindu, Broadleaf, etc.), I will likely have to pass on the higher grades due to budget constraints. Would request scans of all raw cards and possibly others as well. My email is DHarford@satx.rr.com

Thanks
Dave H