Adaptor - UK / Belgium

Hello and happy new year to all.
I have a number of electronic gadgets that I brought over from the U.K., and I would like to buy an adaptor that will allow me to plug them into the Belgian sockets. I asked around in IKEA and BRICO and they had none, and told me to go to the airport and ask there. Is there any easier way to get hold of such adaptors? Thanks for your help.