I have, however, discovered Tucows Classic, which could be a useful link for anyone who has to maintain old computers for their less technology-literate family members. Lots of older versions of software, like Paint Shop Pro 3 and WinZip 6. (PSP's onto version 7 now, and WinZip's on version 8.something).
(BTW, I have updated my CD trade list. Have a look!)