Ignoramus28889 fired this volley in
:

I think that I will just get a replacement if I cannot find a kit.

Ig, most any ARO (Ingersoll) Alpha-body valve would swap out with that
one (although it might not bolt down in the same footprint -- a sub-plate
would solve that).

Even their ordinary solenoid-operated valves can be easily converted to
independent pilot supply operation, if you need to. (you won't at the
supply pressure this thing runs on).

ARO Alpha body valves are cheap and reliable.

LLoyd