I'm thinking you'll need to find a factory loader for your MF or one from Woods, Rhino, Westendorf, etc. Problem is, even on a 2wd tractor, the loader is a really handy addition (maybe it's not the latest and greatest setup, but it sure beats a shovel and wheelbarrow!), and not many owners have a reason to get rid of one once it's been installed on their tractor. So unless the tractor is being parted out, the loader and tractor stay together.
As for the 2wd + loader thing, you've got a couple of things going for you: a) you already have power steering, b) yours is an industrial model, I think, and may have a heavier front axle. You'd still need to load up the back with all kinds of weight (tire
ballast, weight box, etc.). That was the way things were back in the day, and it worked, but the newer 4x4 setups have an advantage. If you can score a good used or salvage loader, go for it, but a new loader would probably cost more than the tractor.
We don't have much in the way of tractor salvage places in our area, but there are some big ones scattered through the Midwest (Texas to North Dakota) that might have something. Maybe some of the antique tractor forums or others here on TBN can give you some names.