What size glass, what options, etc.

Have you called ThermaTru? They are probably your best bet and probably as cheap as a local glass shop.

Thanks - we have been trying but all the therma tru vendors near us have either not been calling back or are taking their sweet time to get a quote. Its frustrating to try to buy something and no one wants to sell it! :) So I was just curious if anyone had a ballpark idea since I was sick of waiting.

Call ThermaTru directly and give them the serial number.

What is the reason for the replacement? Would this be a warranty issue? The glass in most doors is replaced pretty simply.

Generally just a sandwich frame with insulated glass. If not a warranty item you can get glass from a local glass supplier or they can order the new sandwich frame with glass. Should be in the range of $100 - $150 if it is a half glass type door without blinds between the glass and if you were on Long Island area or a similar labor market probably be $175 to put it in.

Ah, missed the 3/4 glass so maybe add the material price would be $50 more but the labor should still be in the same ballpark.