Parts for NX refill pump ?

[Allfoursmokin]

Hi there.
I could do with some help from the home of nitrous.
I'm based in merry olde England (yeah, that's part of my problems)
and my NX refill pump has died.

Any UK NX "dealers" are total wasters (box shifters) and I'm loathe to give NX another penny. (Looooong story)

Does anyone know the part number of a rebuild kit, or even better the brand of the pump so I can get my own parts ?
(At least NOS list a rebuild kit for the Sprague pump they use)
Surely you guys don't just trash these things ?

Thanks in advance for your time.