Found a few in the archives. These won't last!

A great alternative is the NOS Tesla EF806s (high grade EF86) https://www.kcanostubes.com/content/nos-tesla-ef806s-not-jj-high-grade-ef86

Another great one is the Amperex, Holland, EF86. Darios were made in Holland and appear to be identical to thise tubes https://www.kcanostubes.com/content/nos-amperex-holland-ef86