Source for metric thread (15mm x 1.0mm) supply hose

Need source for metric thread (15mm x 1.0mm) supply hose

I'd like to find a (extension) supply hose for a faucet sprayer somewhere around 3' long with a male fitting on one end and a female on the other. The fitting threads are 15mm diameter, 1.0 mm pitch.

Does anyone know where I can order hoses with 15x1.0 mm fittings?

All I could find on the net was a whole-sale suppler in China, and a beauty shop supply house (think hair wash sink sprayer).

Unfortunately, the beauty supply house kept saying "1/2 inch metric thread", which is a contradiction in terms. I wonder if they meant "a little more than 1/2 inch"? And they didn't say anything about pitch.

Can someone had worked with a beauty sink and can verify that (European models) are generally 15x1.0 fittings?

Thanks!

BTW, this fine sprayer comes from Eljer.

Should I consider their metric hose a bug (off-shore manufacturing), or a feature (can't mix it up with a supply line)?