I would suggest that over the years, the items of EIS got seperated from the main kit, and the rifles either sold incomplete, or with no EIS at all. I have bought enough surplus items that came with a deviation list, and Lord knows it was not often you would get issued a kit from supply without some deviation.
The same question as to contents came up on Jouster Enfield forum, and I gave the same list (except with the part numbers) onto there. Even Brian #### (of BDLtd) had only three items with his Cno7; he was missing the loop but had both the nylon and the brass brush, along with the jag.
There will still be a checklist for the 22 rifle in service. Maybe someone still serving could drag it out and see whats on it today. Plus, with the NSN's, a guy can look up for the manufacturers numbers to get the proper attachments.
As I sugested on the other forum, I believe that with the 4th item stowed on the rod, you would offer some protection to the threads on the end.