Portlight Replacement

Mar 20, 2018
1
Yorktown 35 King Harbor, Redondo Beach, CA
I have three leaky portholes on my Yorktown 35 and they are old and have some slight cracks. I'm concerned about breaking the now brittle plastic flanges by removing them and reinstalling them. I cannot seem to find anywhere to purchase replacements if one is broken beyond the ability to reinstall. Can anyone help with where to go to purchase replacements?