Welcome to vRetro Design!
I've been making and selling Sinclair related stuff for about 5 years now and mainly due to the changing world situation, have decided to go it alone with an online shop of my own. Not an easy task for the faint hearted as I've found.
All my usual products are available including vDrives (of course), replacement ULAs for most of the Sinclair computers, and a few other handy items for retro enthusiasts.
Have a look around, just maybe there's something that will spark your interest :-)