I just looked at the replacement bowl setups from Ranch Hand Supply and they show two different styles. You can see them here:
Jinma Fuel Sediment Bowl
Also checked an online parts catalog and they list two different styles, one with a straight thread (metric) using a jam nut and seal and one with a tapered (NPT) thread. Both are still available and for less money than the after market replacement. I still would recommend the after market, as an upgrade.
Other after market replacement systems will probably require some kind of plumbing adapter and mounting bracket. I believe the metric fitting you have is referred to as a STOR BOSS fitting. If you look around a hydraulic fitting web site such as Clearwater or DIscount Hydraulics you can probably find an adapter or combination of adapters to get from what you have to what you will need for some of the other solutions.
The original setup on my tractor was: Tank - Sediment Bowl with screen - Lift pump - Secondary filter (NAPA Gold # 3195 at 10 Microns) - Injection Pump. As stated before the factory plastic bowl got cloudy and was leaking so I upgraded. The lift pump started leaking at the plunger seal which was just an o-ring. I couldn't keep it sealed so removed the lift pump and made a cover for the mounting boss. Then installed an electric lift pump and have never looked back. I bought my tractor in a crate and assembled it myself. At that time there was a really good document about how to do this and it recommended replacing all the factory fluids and filters with quality domestic products, which I did before it was ever started. 900 hours and 16 years later it still has the same fuel filter on it.
The only fuel related issue I have ever had is one winter I got caught with # 2 in the tank and while plowing snow at -18F it would run fine in the yard but when I got to the road at the top of the hill the wind blew the heat away from the engine faster than it could produce it and the fuel jelled up on me. Fortunately I was able to get it back to the yard and left it running at a very high idle while I ran to the truck stop for a bottle of 911. That worked and I didn't even have to replace the filter then.
Hope this helps