I have happy memories of when such as Woolworths, the Co-Op, Post Offices and just about every Newsagent sold kits. In fact I built a few for a newsagent in Sth Elmsall. My treats were trips to Cuttriss' in Doncaster, plus two others, Beatties in Leeds, and a smaller one whose name escapes me, as does the name of the shop on the outskirts of Wakefield.