I don't know where there is a car boot but there is a place in digbeth in Birmingham called the custard factory. It's the place where they used to make birds custard (i think its on gibb street). And there is a retro shop straight opposite the entrance and they sell all different retro stuff including retro phones. Go on here
http://www.118118.com then type in The custard factory, digbeth birmingham. Hope this helps
sarah xxxxx