Need help finding replacement Waste Cap please

Hi, John Johnson here in Annapolis, MD.

This is my 1st posting, so let me know if I am not posting in the right location or anything such as that.

I have a 2001 42' Post. Love her!

I purchased her in 2021 and found that my port side waste cap, "two holes" for opening is unusually shallow which caused the previous owner to use the tried and true hammer and slot screwdriver method for opening and closing. Now that this has been the case for some time now, this can't continue much longer as the cap is getting worse.

The cap itself measures 2 3/8" diameter. I have searched West Marine, Defender.com, and other small shops with no luck. I have found 1 1/2" - 2" - 2 1/8" but not 2 3/8". Not to mention I have no idea about the thread size. I am wondering if anyone else has had to replace this part. I am hoping I don't have to replace the entire assembly just for the new cap. However, access seems to be lined directly up with the galley's peninsula cabinetry. I am sure it's accessible, but not the easiest for sure.

Any thoughts or suggestions?

Thanks so much, John

Thanks Chris!

That makes sense. I will check this out and measure the outside diameter of the thread. Then see what I can find.

Thanks so much, John