Ignition / lock compatibility

Hi, Mork calling Oracle, come in, Oracle.
finally looking to buy a new lock set for 2000 RS, after visiting many sites and lock shops and smiths I can-not get a replacement key for the one I have ( nearly goosed). It seems that some previous owner bought a, US, Canada, import, possibly Daytona eBay no doubt cos I cant get a blank from Triumph that fits and I dont want to guess again so I will replace all .
So my question is How close to the year, make, model, do I have to be?
Does 2003 plug in for example? The seat lock and petrol cap look standard across the board, (no?).
Answers please on a post card to Thames television Tedington Lock London se 9 10 jp always wanted to say that but showing me age me thinks

 

hey Biglad, yeah 320, on Triumph site .
Had a ride last night through Turriff to Cuminestown, New Byth ,and home on the Fraserburgh road, short run to test brakes finally got then as good as I think I will get them I had a bubble in front master.
Used to get a good night out in the Grassocks and at the St Katherines hotel Cuminestown mcc put on a good do.

 

Bad news. Greens burned down 15 years ago still a ruin... did you ever get to The Tolbooth in Banff a great going bar around the same time . Grassocks is a private home now too, Great days
There is a lock set on ebay but 2003 different engine I think everthing else is the same might have to risk it

 

ta ...good thinking

 

bought set off ebay today