There are a bunch of custom gunmakers here in the USA that build fine No.1's. Prices can go from mild to wild, depending on what you want.

Carolina Precision appears to be a well trusted name in building and tuning a no-frills tack-driving No.1.

Names like Mark Stratton, Steven Dodd Hughes, and others can turn a factory No.1 into an exquisite piece of highly functional art.

I believe both Mark Stratton and SDH post here.