It's really funny that illegal dark web sites are more consumer friendly and well designed for ordering...products... than the big legal sites like Amazon
The one I used isn't dark web, and looks like the finest web design 2001 could bring https://www.qhi.co.uk/. The site looks dodgy as hell
Funny thing is, now I have a new GP who has been much more co-operative, so I'm just gonna give them to a friend of mine