Hoi Pascal,
since you are located in the Netherlands, I would recommend some of the more familiar online shops in continental europe (carrying Strelets).

Linear A
https://www.linear-a.de
Sockelshop
https://www.dersockelshop.de
Kamar
http://kamar-zinnfiguren.de/index.php?language=en&gm_boosted_category=
Tracks & Troops
http://www.tracks-n-troops.eu/shop/index.php
... and many other polish, german, czech or ukrainian onlinestores.

Don't know where exactly in NL you live, but you're not without options. There are quite a few dutch onlineshops (Miniatuurwereld for example) and still some local stores accessible (in Maastricht e.g.).
Depending on your place of residence you could also visit one of the larger stores in the nearby neighbourhood (Antwerpen or Gent in Belgium, Bremen or Aachen in Germany e.g.).

British shops often charge comparatively high shipping costs from continental customers.

Good luck with your search! :+1: