Can't understand why you say it doesn't fit the lowered sidestand, I've just bought the lowered stand after lowering my bike and its exactly the same foot as the OE.
I can't speak as to what you purchased, but I can guarantee you that the OEM sidestand foot on the XR, when factory lowered, IS different and it's not just a shorter sidestand.
I tried this and there was no way it was going to fit. The vendor himself even had stated it would not fit.
If you search for my posts, you will see that quite a few other vendors also state that their enlargers do not fit lowered suspension bikes.
I bought an R&G one next, which also did not fit, but luckily was softer metal and I shaved some of the inside edge on one side with a dremel to make it fit.