IH 240 Utility ??

Aftermarket parts are expensive and time consuming to develop. They don't just grow on trees. When a company decides to produce an aftermarket part, they carefully analyze whether it's likely they'll sell enough copies to make a profit or not. If profit is not likely, as in the case with a low-production tractor like the 240U, they don't make the part.

Some parts for a 240 will be available, ie. parts common with other models, items such as power train parts. However items like decals and other items exclusively 240 will become scarce. There were only about 15,000 Farmall and Utility 240s ever built. I doubt those few items will ever excite the after market suppliers.

I see this with my 130, I lost one of the model decals, and was close to 10 years finding an original. After market does supply those, but they are different from the originals, and rather cheap looking as well.

Think about it this way, most letter series and supers were well over the 100,000 unit mark, some of them close to 400,000.