[urq] Fuel pump inter-compatibility?

[urquattro at comcast.net]

I'd like to try a stock-spec urq fuel pump to see if the uprated one I'm using is causing my perennial rich-idle issue. A cheapy junkyard one would work best for testing purposes, since I'm not sure that's where the problem is and a brand new one is 200 bones.

Obviously, the junkyards aren't brimming with urqs; anybody know a compatible external-type unit from another car I could try? Coupe? 4k? Early 5k? VW something?

TIA

-Jon