Found this on Reddit, it's too good not to share.
archive.org/details/@musicfan100 - searchable full catalogues
dev.argosbookofdreams.co.uk/ - less searchable but cool interface
Wow, it really takes you back to look at them!! Brings back so many memories!! (and, I am a bit shocked at how expensive things were 20+ years ago!).
[* * Link edited by MNHQ **]