I could make a tranny spacer in my garage for the cost of steel, 50 dollars or less.

It would actually be pretty easy to do, and wouldn't need as much precision as you might think, with just basic tools such as a cutting torch, drill press, and a number of drill bits.

I believe the have 3/4 in steel circles and squares at my local metal supply store in various sizes up to maybe 2ft for flat rates in the 10 to 50 dollar range.

It would take me all day though, and from that perspective it wouldn't be worth it.