See also Low Cycles for boutique alloy.
mki road | LOW// Bicycles
Some of the UK shops sell low priced Al framesets. For less than 2 bills you can get this:
https://www.ribblecycles.co.uk/ribbl...cing-frameset/
I bet that with some decent wheels and a 105 groupset, you'd have a great bang-for-the-buck crit bike.