Hey Rab! Welcome!
Wow That Sucks!
In theory, I think you should be able to get one relatively simply. But, getting it changed out however, might be a little more involved.
It's just a guess on my part, as I haven't had to trace the wiring, or do anything else with the ignition for that matter, but I believe it plugs directly into the VCU, which is buried in front of the swing arm.
You shouldn't need to worry about the keys though. Did you receive a small tag with the keys, when you bought the bike, it would have a key code stamped on it? If you didn't, Triumph may be able to come up with it, via your VIN. Then it should just be a matter of your dealer, or part person, contacting Triumph and getting a replacement ignition module, with a tumbler to match the keys sent to them.
I think the rest of that assembly is just a proximity transmitter/receiver module with the key tumbler barrel inserted inside. The decoding and acceptance part should be done by the VCU. In short, the part you need to replace shouldn't care what key you use as long as the tumbler is right. It just transmits and receives the query sent to the key, and passes it on,,,
I think.. I could be right out to lunch! :smile2:
Still Sucks though....:frown2:
I hate to say it, but you might want to file a claim with your insurance if you haven't already, it might get expensive..
I hope you will keep us posted, I am curious as to what needs to happen!