1/4 glass 33 5 window

[Rpconst]

Hi there, im needing to find a 1/4 glass and install it in my 33 5 window. I would love to find an original but no luck. Most advise is to get something of that vintage and have it cut.
Also I can’t find anything on the websites for help on installation. It appears that it uses a certain weather seal that is held down by flat channels held by wood screws. Any helpful thoughts on these issues would be appreciated. Thanks