I found a place called "One Day Glass" ... evidently I can specify the type of glass I want (Laminated), upload a CAD file (which I can do) and they will produce the glass and send it to the house (free shipping).
Something I don't understand is that windshields according to my research are almost always made of the more expensive laminated glass rather than tempered glass. Wondering why Curtis Cabs uses tempered glass when I guess that is a BIG no-no according to safety organizations. SIDE windows are often tempered glass ... the stuff that shatters in a million pieces ... but evidently some auto makers are shifting to laminated for the side windows also.
The quote for a plain piece of rectangular laminated safety glass 1/4" thick was $136 ... can't imagine drilling a few holes will cost a fortune. So I think I will start taking some measurements and see if I can work up a drawing. Maybe make a template also.