@blitter I've recently ordered a (25 unit) bulk pack of Fluorecare combination tests (COVID, Influenza A/B, RSV) off Praxisdienst, which is a German supplier so presumably also ships to German-speaking countries. Claims to be for professional customers but will sell to individuals too

They were quite a bit cheaper on a per-unit basis than pretty much every other seller I've found that ships to NL (which all just sell like 1 or 5 tests at a time).