Check here L4M4: https://eu.nkon.nl/rechargeable/18650-size.html

VTC5A from €4.99/piece.

At least for me shipping from NKON can be quite affordable.

Cheers ^:)

P.S.: when looking for the actual performance of 25Rs at https://lygte-info.dk hope you look at it in some recent rewrap like Enercig or Vapcell. HKJ's tests of the name brand cells are pretty outdated.