I have created entries for Canning in The Literary Encylopedia and Wikipedia.
The well-known literary agency Curtis Brown handle the rights to Canning's work.
The US publishing house Crippen and Landru has just published a collection of Victor Caninng short stories which I have compiled. Follow this link to their page.
I have restored the three Mr. Finchley titles into print by using the print-on-demand service Lulu.com. Details are on the availability page.
Meanwhile an audio book of Canning's 1936 travel book, Everyman's England, read by Charles Collingwood, has been published by Crimson Cats Audio Books (click on this link for details).
I recently came across an enjoyable song by Chicago rock musician Fred Prellberg called Victor Canning and me. He wrote it, he tells me, "to express the personal relationship one can form with an author or a songwriter", and attributes his liking for Victor Canning's work as "probably the identification with hard-scrabble heroes, long on individuality & integrity, but seemingly at odds with their world & their times". You can listen to the song and other sample tracks from his album on this link.
See my own list of copies for sale and the availability page.
The widest selection of secondhand books is probably to be found on the ABE (Advanced Book Exchange) site, which includes many professional and amateur dealers.
The Amazon site is a good source for new and, through its Market Place section, second-hand books:
Individual Amazon links are included in the bibliography where relevant.
For professional second-hand book dealers, two very good sites are Bookfinder and Addall, both of which search a large number of second-hand outlets world wide.