Anyone know of a source for new l'hotellier fittings?

I received an email from the son of an home builder in the Ukraine asking about a source for these fittings. He found my name from my web site where I described adding wederkind sleeves to l'hotellier fittings on a DG glider.

One possible source would be glider manufacturers. Besides DG's, what other glider manufacturers used l'hotellier fittings?

Thanks, John