I found Switch Electronics online whilst searching for a relay board for a small home project. I fired a question in and Ben replied immediately. As a result, I changed the design and bought three small relay boards from Switch, and they arrived very quickly. I’ve subsequently had a look through their online stock and it is extensive and well-priced. I think that if a company is prepared to respond to potential customers in a helpful way and then deliver less than £14 worth of components quickly and with follow-up then they’re doing a lot right, so I’ll definitely be using Switch again. Highly recommended - check Switch before resorting to Amazon!