I have Sussex Armoury catalogues as follows:
10th Anniversary 1978/79 (it unfolds as opposed to being stitched)
1980 (this also unfolds etc)
1981 (stitched) also
Military Division, A5 size mono, 1979/80 and January 1980 (no airguns, all militaria).

Scalemead Arms Company cat no.6 1989

I also have the capability to scan them (in colour of course). Email me and let me know what you are looking for and I will see if I can help.

If there is enough interest here I could consider making a repro one(?) or a composite relating to air guns(?).