no normal glass shops will not be avle to do this....you will need to go to a auto glass manufacturer.....up here in canada the company is called PPG. Another alternative is to buy 3mm Lexan. make your template to the rough size of the opening, a little bigger if possible, then cut the lexan to a sightly larger size, lay your old windsheild down on some saw horses....
lay the lexan on top and use a heat gun and start heating the lexan, when it warms it will conform to your glass and will shape itself. once the shape is formed, you will need to grind edges to make a nice fit, then when it fits use windsheild sealer and mount it, you can add a couple of screws into the glass and channel for added strength, the molding will hide it. this is the easiest route i feel. But having molded and custom cut glass might be expensive, try emailling boyd coddington, ive watched a couple of his shows and they use glass. might be an option......good luck hope this helps