Thanks to Chris from Audio Damage for pointing me back to the Boombox Museum. I linked there a while back but totally missed the best bit - these amazing 80s boomboxes with built in keyboards. They're incredibly rare, but get these model numbers locked into your eBay favourites: Casio KX-101 from 1984, Casio CK-200 from 1985 and Fisher SC-300 Stereo Composer. A couple of weeks back, someone tried to sell a SC-300 on eBay (here) with a 'Buy it now' of $499...