Supplier or Alternatives for Glass Pipe and Fittings

[ElderX]

I am a project engineer in a pharmaceutical plant in NC and we use a large amount of glass pipe and fittings. We have noticed that many of the suppliers of this pipe are discontinuing production. It is getting harder and harder to find fittings, especially ball couplings but other components are in short supply also. I was curious if anyone else had faced this problem and:
1. Are there alternate suppliers overseas
2. Are there alternate materials such as non-metallics, especially something that is transparent such as glass that could take 150°C and solvents??

Thanks for any assistance
ElderX