It’s become increasingly challenging to find suppliers that stock the original C64 sized power switch for MB-6582 and sammichSID. My standby had been the Retroleum shop: https://www.retroleum.co.uk/c64-misc-components-fuse-etc But, they're not shipping at this time, due to Covid-19 impact   I managed to find two suppliers on eBay that seems to have good on-hand supply:   Suppler based in UK https://www.ebay.com/itm/401182009175     Supplier