No numbers or other info on parts

A home owner from Southern Illinois says:
Hello,
I'm replacing the plastic glazing on the windows of an older house. the old glazing is so brittle that it just breaks apart. I've attached a couple of photos of the old stuff. It's hard to get a good cross-section as it just breaks apart when I try to cut a clean cross-section. The face that shows when installed is 5/8". Can you help me find a replacement?

Thank you.
Cornelius
User submitted photos of a glazing bead.
Profile picture of Paul
Paul from SWISCO responded:
Take a look and compare your part to our 55-158-6 Rollyson snap-in. Let me know if it looks like a match to you.
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