if I can’t find a replacement bowl. I’d just have to figure out the mounting, which should be pretty simple
Did you get this resolved?
Some Ebay listings sell the element / bowl / o-ring together, as a kit. You might buy such a set (or maybe a previous owner did). I think any of the similar bowls will mount on your housing.
When I bought the YM240 (US version of YM2000) in 2003 it had some prior owner hacks that I remedied to get it back to stock. The fuel filter had been replaced with a cheap disposable filter.
I went to the importer/wholesaler of VN 'refurbs' and bought the correct filter assembly off a salvage YM2000.
Then I discovered that their warranty return 'refurb' with the blown engine had been refurbed(!) with a fuel filter bowl and element that Yanmar never heard of.
After I bought the proper element and bowl listed for my model, it then conformed to the factory parts manual so buying elements has been simple ever since.
The bogus fuel filter I discovered on the YM240.
The used filter assembly from a blown 'refurbished' Yanmar - with wrong, unknown element and bowl.
After I added the proper bowl and element, maintaining this has been simple.
And some trivia for the real Yanmar enthusiasts if you've read this far: That YM240's zig-zag throttle linkage is how tractors sold by Yanmar-US conform to the American standard of pull the throttle lever to slow down, while my YM240's twin sold in Japan, YM2000, has a simpler throttle lever you push to slow down.