And on a vain attempt to steer the thread back on topic, the camo scheme is pretty interesting. It reminds me a little of the ‘dazzle’ scheme used on warships in WW1.
That’s interesting as both of those are a different shape (rectangular, without the chamfered corners) and not the one pictured. I suspect any of those three would be correct, which would make your life a lot easier.
I have had a search for you. It is suppressor type ‘W’, Air Min ref 5c/1614. I am looking for one too if you manage to find a spare. These are not common so good luck.