Here is an immobiliser and some suppressors (I think there is an earlier version suppressor too)
The immobiliser could be faked with some suitable size rubber tube and slid on the HT lead and glued with silicon or something. The brass connector is the same as the cable connector on the tail lamp for instance.
With the suppressors, I never want to put any extra stain on my mags, so I gut them, drill them through with a 7mm drill bit and slide them on the lead with a dab of silicon.
Steve email me if you want a suppressor but the original immobilisers are very hard to find and I'm not parting with this one.Ron
The brass connector inside the imobiliser looks not the same as the taillightconnector ron..they are made from a hexagon instead of knurling and the thread is much finer as the one on your pics.
The brass connector inside the imobiliser looks not the same as the taillightconnector ron..they are made from a hexagon instead of knurling and the thread is much finer as the one on your pics.