* [[Mainboard Versions]]
* [[Amstrad part numbers]]
* http://www.sellmyretro.com/ - Buy new keyboard membranes for CPC664 from RWAP software
* http://www.rwapsoftware.co.uk/ - RWAP Software, makers of membranes for Sinclair, Enterprise and CPC664
* http://www.tradeinpost.com/ - Buy new keyboard membranes for Amstrad 464/6128 Plus