I'm sorry your answer wasn't in the form of a question.

A nod to Alex.

I was just trolling ebay for parts.
Not many and not cheap.
Ok, utilitarian for now. Let's get a good quality gravity feed 3-5 psi electric pump. I'm thinking to use a relay switched by the ignition, to feed the pump straight off the battery with an inline fuse.

So who had an ultra reliable low pressure favorite?