[Zeke]

There are other ways to set up a temporary lathe turning operation. But I have to agree with Billy that a roughed up round pipe pressed into a threaded hole, thin I assume, is not the best idea. Vibration, not to mention other conditions may very well make this a short lived deal.

There are plenty of threaded plugs out there and starting with Amazon and eBay is a good idea. You might end up looking through the McMaster catalog to find your item is you know the specs. You can drill out a solid plug and thread it.

AFA machine shops go, they dislike one-offs because they can't charge enough to make it pay a small profit. A home machinist such as myself is another thought. Being "in the middle of nowhere" is actually where you might find these folks.

Seeing @Dpmulvan's pic makes me think it's out there. Worst case is you find a pipe with the correct OD threads and buy a tap. Do it right.