Vintage style brass roller buckles.

[Beerhammer]

Anybody have a lead on these? I know vintage engineer boots used to sell them but hes since taken them down from his etsy.

[deanclean]

Something like this?

[Giles]

Nope….they're concave.

[deanclean]

Oh right. That wouldn't work on a boot. Darn

[Beerhammer]

Thinking more along the lines of these flat square types

[mikebarhoot]

check Tandy Leather in the US.  or Springfield Leather in MO.