Sorry I can't help with a good glass shop local to you Tex.
Re: The replacement gasket,the general consensus is that
Steele rubber products are by far the best quality,and AFAIK is made in the USA.
Most of the aftermarket rubber is produced in the R.O.C.,my own included and it has deteriorated and split in less than 6 years. It hasn't even been on the road yet!
Good luck with your search.