so steve,

can i assume the 2 part numbers i sent you back when you first started this were incorrect?
Those were the numbers for an inline and a distributor type inj pump they show in the parts manual for this unit. From the pictures/video you showed me you have a VE type distributor inj pump.
And one of those two numbers i gave you should have worked.
There is a repair kit for that injection pump but it is pricy, $100 or more here in the states, not your best option.

your only other option is to take that filter to a local cat shop or a diesel injection pump rebuild shop and see if they have one. (if you have one in your area that is).

after seeing those pictures/video you had posted it was hard to tell the make on the pump because of whatever was all over it, dirt maybe? try cleaning it up some and see if you can find the tag on it, there should be one on it somewhere that would have the make and model and serial number of the pump itself.