3300 Replacement Portholes

[2004_3300_SCR]

Speaking of portholes - has anyone replaced one in the cabin roof of a 3300? What did you use / where did you find it?

I have one (over the v berth) on which the strut rod base cracked off at the base on the frame, so now the strut rod is just hanging there. The plastic where it cracked looks pretty dry - these things are old - so I don't think an epoxy would repair it effectively, especially since there is so much stress at that point.