An estimate? If for a new top, I can't wait to hear the outcome of this "estimate".
Prepare for a bill higher than your house payment.

If all you need is a new top, I'd order one from BAS (around $700 delivered); then wait for one of Dean and Lori's tech days in Nashville and drive down there and get it installed for the price of a case of beer or a lunch for the guy(s) that do it (which would be Zach - MrPeabody on the forum, gray shirt on the right, below). You can even spend the night at Dean (blue shirt) and Lori's(flowered top), their home is around 3000 square feet.

Zach and Robert did mine in a condo parking lot one morning....