He'd be replacing a good pump motor with another good aftermarket pump BUT still have the damaged housing.
Yup. The first thing I did when it broke was check eBay, get excited that they were so reasonable, and disappointed when I figured that out. But now I'm thinking about following ya'lls advice and setting an eBay alert for used pumps.
JB Weld update:
I don't have a lot of experience with JB Weld, this is probably my third project to use it. After confirming that it was fuel-safe and rated for temperatures and pressures far in excess of what the outlet would experience, I took my (original) broken pump housing and
-Cleaned off the remains of the previous owner's epoxy (or whatever it was),
-Roughed up the surface of the plastic housing where the JB Weld would go,
-Fit the pieces together
-Plastered over a large section in as thick a layer of the stuff as would stick.
-Triple checked that the opening was unobstructed and there was no sign of JB Weld leaking in
When I came back in 45 minutes, excess was dripping off in every direction, but it was still soft enough for me to clean it up. Another 30 minutes later it looked the same, so I left it overnight.
I just checked on it, and while it appears very solid and sturdy, I should have quadruple-checked the opening. Somehow JB Weld dripped through the crack and completely blocked the outlet.
So now I have a perfectly strong paperweight. I'm leaving town for a week and a half this morning, so I won't be able to try anything else for a while. Thanks again to everyone for all your help and contributions, especially FB400 for sending me your old pump. I'll be back on the case as soon as I'm in town.