Before contacting (or paying) a supplier, confirm they actually make what they claim.
What to check
A real producer has an imprint/company-registration page, product pages describing capabilities, consistent contact details on its own domain, and language about production rather than only "we supply" or "we trade." Directories and resellers fail most of these.
Fiorentis reads each site and scores it green/yellow/red with the evidence, so you can verify at a glance.