Metric tubing source?

[kf4zht]

Assuming you tried metal supermarkets, McMaster and speedy metals.

Have you checked Amazon? Search can be a pita but I order a ton of small sizes of metal from there now. With prime shipping the prices are pretty good

 

[PeteLongstreet]

Tried Maryland Metrics? Their website requires a bit of navigating but I saw a couple of possibilities.

 

[patracy]

I ended up buying some tubing (standard) that was close enough off ebay.