Round Orbix hatch for the older Wildy Tarpon 100

Hi everyone, just wondering if anyone can suggest somewhere I can get a replacement round Orbix hatch for the older Tarpon 100, the hatch with 6 screws. I bought the new one but had to return it as it was too small. I understand that Palm no longer make them so am struggling to get a new or used one to repair the kayak so that I can sell it.
Any suggestions would be greatly appreciated.

The hatch by the crotch area?  Just measure the diameter and buy a cheap one off eBay.  Should be either 7" or 8".

Yes that is the one, thanks for the suggestion, I will measure the diameter and see what’s on eBay.
Thanks for replying butty, much appreciated