Gilly - its a 1975.
I only have 30 rivets left over, I used about 110 or so to go from the cabin bulkhead forward on both sides. They're yours if you want them but you'll need more. I bought 3rd day's leftovers, he said he had to special order a 500 lot. They are aluminum not ss as I stated earlier, 1-1/4" and a 3/16" hole. I think I could have gotten by with 1" length but I didnt measure.
Try MSC Industrial, looks like they sell 100 lots.
The shelf isnt much of a shelf, it gets more shelf-like aft, but forward the pitch makes the space minimally usable, I suppose one could rig up netting to hold clothing.