The oil pump that came with the mill broke on the bottom lever casting a couple of years ago, and I had John send me a replacement. Different "brand" but same Chinesium construction. The replacement worked for a while but then started leaking from the bottom , so I would fill it every session with just enough to deliver oil. I finally got tired of that and ordered a replacement from Amazon. This dud doesn't even have check valves! I swapped the checks from the leaking one but nothing is getting pumped out. I asked for a refund today via Amazon website, but if I have to pay to ship it back I'll east the $30.

Can anyone recommend a good replacement pump and vendor?

In the interim I made swap the lever casting from pump 2 to pump 1 and see how that goes.