Specs for replacement heat shields for lamp house?

[Ryan Gallagher]

It's been on my wanted list for a while to replace the heat shield glass in the Strong Super 80 lamphouse. The only sources I've found have been crazy expensive for an OEM part.

The late John had a couple but passed them on before I could convince anyone to spend money.

I've been looking at the Borosilicate Hot Mirror specs provided by this manufacturer. Would such a 3rd party part be appropriate?
https://www.knightoptical.com/stock/...t-mirrors.html

(Hot Mirrors are the term for those that pass visible and UV, but reflect NIR and IR).

I need to get the calipers out to verify if any of their stock sizes are correct, but I presume they might be able to do a custom diameter too.

Do you vaunted cinema techs have any sources you already use for such things?

[Ryan Gallagher]

I was also considering Rosco, who has a Borofloat dichroic IR/UV hot mirror filter, which can be done in custom sizes too.
https://us.rosco.com/en/product/iruv-filter

Their No. 8000 and No. 8100 product are very similar but perhaps have different transmission curves?

https://www.gobosource.com/gos/rosco...er-p-3636.html

https://www.gobosource.com/gos/rosco...or-p-3916.html

I guess is reflecting UV something that would have been true of the OEM part, the KnightOptical ones pass UV, where as the Rosco ones say they reflect it.