Micro TIG welders

[9W Monighan]

Welds look very nice.

How about drawing some 4043 wire down smaller in diameter yourself?
Or try to contact one of the wire manufacturers and see if they could run you some smaller. There's a place; Wisconsin Wire Works if my memory is correct. They had some different alloys available when I was looking for the correct Bronze wire I use for mig welding CDA385 architectural bronze.