I have a 1933 Lister CS 3hp engine with the fuel filter mounted on the head. The fuel filter unit has a water jacket and is heated by hot water from the head (see attached photos). I still have the remnants of the original fuel filter 'cartridge' but its useful life ended at least six decades ago.

Presently, I've removed the old fuel filter 'cartridge' and I'm using an in-line fuel filter, however, I would like to adapt the original fuel filter to use a modern exchangeable fuel filter cartridge. The cartridge would have to have the following dimensions:

Maximum outer diameter 67mm - could be as small as 50mm
Maximum length 130mm - could be a little shorter
Minimum inner diameter 14mm - could be larger

I've tried searching a couple of filter manufacturers websites, but without success.

Does anyone know of a suitable fuel filter cartridge of the right dimensions?

Would appreciate help/comments on the following:
I have a Lister CS 8/1 (Made in England; not Listeroid). It runs noisy with a pronounced 'diesel knock-like' sound, more pronounced than my other CS Listers. I sounds similar to one of my air-cooled Listers.

I checked the timing, and spill time, and reset the tappets, to no avail. I have replaced the big end bearing, small end bearing, gudgeon pin, rings, valve guides, valves, valve springs, and injector nozzle. The big and small-end bearings did not need replacing but I did it anyway just to eliminate them as a cause. I have serviced the injector and fuel pump. In addition I have run it with a fuel pump and injector off another CS 6/1 engine but the noise is still there. I checked and cleaned all linkages (including governor) and they all work as intended. I have checked the bump clearance with 2 small lead balls and adjusted to ensure it's within specks (1.9 - 2.03mm). This model has one oil scraper ring above the gudgeon, but there does not appear to be significant piston wear. I have run it as slow as I can and the 'knock' occurs just before the exhaust valve opens as might be expected with a typical 'diesel knock'.

Incidently, the engines starts and runs very well.

This is a 1978 Lister 8/1 (one of the latter English CS 8/1 Listers) and the barrel has recessed corners with the 4 studs on the outside rather than incorporated into the barrel as on almost all earlier CS Listers (the barrel is the original English Lister barrel and still has the factory hone cross-hatch). Could this different shape of the barrel with the 4 studs on the outside be contributing to the 'knock' sound? Has anyone else had a similar experience?
Alternatively, is there something I may have missed?