If you have the perkins number, as Charlie mentioned, MOST NAPA or other equal auto parts can cross reference a part for you. I doubt it will be equal to a GM/Ford or equal filter.
I have a private parts store down the road, they get things for my bobcat, boat, trackhoe, BIG walk behind lawn mower.........They may not have it in stock, but usually with in 24 hrs I have it, if not the same day depending upon the time I call/go in and ask for a part.
She drives me boat,
I drives me dinghy!