Maplin seem to have discontinued the following parts: MC78L05ACP (Motorola) 4-way DIP switch (They have the 2-way version though) REF-01CP (10v ref IC) & also they cant seem to get 100n polyester layer caps (Siemens). I had ordered these for Tony Allgoods midiDAC. Go to RS instead, they seem to be able to ship the correct parts too. Andy.