I have been looking at the kits that were available, mostly between 1961 and 1969. As well as being components of the two big Gift Sets that every collector would love to acquire but which few will ever even see, the Silverstone Racing Layout and the Garage Layout, they were sold individually.
The plastic pieces required painting and gluing together so if we do find any that have been made up now the appearance of the product is very much down to the skills of the youngster who made it. Buildings ought to be OK but I'm not so sure about the telephone boxes. The later public and police boxes came with characters that needed to be painted and they would be quite difficult to get right for most of us. I can see very few of these kits for sale in made-up form in my early searches. I guess that those listing them on Ebay, for instance, will not necessarily know they are Corgi or even kits so perhaps by using those two search terms I wouldn't get a great many anyway now I think about it.
I would like to get hold of examples of all of them now but suspect this could take a while. I can find most of the unmade kits in nice original boxes but I wouldn't want to spoil those - and, anyway, they're extremely expensive!
My spreadsheet lists now include the kits 601 to 611. I think that's all of them. Here they are for quick reference:
Below I include illustrations from the 1961 and 1965 catalogue pages. As and when I can find some decent complete models then I will add those too but I fear that could be some time. Of course, if anyone happens to find some reasonable models, or even part-completed items, that they can let me have at a modest price so that I can feature these things better, do get in touch.