Talk Morgan Forums Thread Like Summary - Super3 Accessory Rails for Side Blades

The Morgan Super 3 booklet on options differentiates between accessory rails for the cockpit area and those for the side blades. I got the soft panniers which came with two rails for each bag. Need to get the corresponding rails for the bottom of each bag, which apparently attach to a "loop" (looks like a strap of the type you'd see on a backpack or other carry-all). I gather that the loop may be in each bag--I'm having my guy check that--but wondered what the difference is between the cockpit accessory rails and the side blade rails apart from that-- FWIW, all are apparently "out of stock" right now from the factory, Melvyn Rutter and a couple US dealers.
Here's images of what I'm talking about:
accessory rails options by William Hart, on Flickr

bottomrailbag copy by William Hart, on Flickr

Otherwise, proceeding apace. We've installed the underseat locking compartment, next will be to wire in the Beeline Moto II with charging mount, and we have not yet gotten to the tonneau- I specified the mohair in gray to match the color of the vehicle, but gather that Morgan supply different versions, depending on whether there are wind screens (which I have). Another issue my guy has to look at--I'm hoping these are zippered to allow only passenger side to be covered.
Doing these optional accessories post purchase isn't as easy as you'd think. If anybody is considering a Super3, I'd suggest buying one that is fully optioned already. But my question re the accessory rail differences remains as I sort through this process. (The shop is a 1/2 hour drive from my house so I'm not there hands-on; thankfully one of the owners has a M3W Twin and is very "invested" in getting mine sorted properly).
Cheers to all,
A Yank in Texas

Billhart, I can confirm that the rails are all identical, they are the same piece of aluminum casting