Epilogue: Still not sure of the best place to buy an OEM top, but I did find a great place to get the entire job done, and THEY have the connection for the best top. Entire job was under $1,700 all in. You can't tell it from new - split rear window and all.
If anyone in the North SF Bay Area needs upholstery work or a new top, PM me and I'll give you their information. I was very happy with the outcome.