If anypone is interested,
I just received a brand new AC Delco fuel pump (In original AC Delco packaging). It was on E-bay for $110.
That is the best price I have seen anywhere for the real AC Delco item, to fit my '98. Listing says they have a couple remaining in stock.
Now that I have a spare, I probably will not need it ( I have no idea when the current one in the van was installed, but the fuel tank brackets look like they might have been 'disturbed' at one time, because the undercoating has been knocked off the bolts as though a socket was on them. Van has 214K on it)
E-BAY: "New AC Delco Fuel Pump Module 1997 1998 1999 Astro Safari Van 4.3L MU109 MU1782", from seller, Global-Automotive