While there is XACD and Titan for the custom ti, are there any options for (cheap) custom steel? I'm looking to design a frame similar to the Cotic, One One, Soma Analog, etc. with some special geometry requests for Effective top tube.

I'd like a high-end steel. It doesn't have to be an 853 level, just lighter than the tank like 4130s of dirt jumpers. I am aware of all the US builders, and would certainly go this route except for wanting to try this out as cheap as possible, and the 'fun' (though it sounds like aggravation) of designing it and getting my name on it.