I have one of these: https://www.vwheritage.com/shop/AC127200/fuel-pump-facet-electric/" onclick="window.open(this.href);return false;
My regulator leaked, so I've bypassed it for now. Doesn't seem to be a problem.
I've got mine wired via piggybacking the oil pressure switch or the alternator (I forget which, but can check if you're interested).
I haven't got an inertia switch but essentially with my set up if the engine stops turning, the pump stops pumping.
P.S. my pump is fitted above the gearbox, close to the fuel tank exit.