In my case, it's Tamiya TS-3 spray cans.
I cannot find anyone, who can supply me with this item. They all have it 'On order'.
I phoned up the importers, and they said that "They are waiting for a shipment to arrive in the country, and then they can supply the dealers".
He assured me that a container was due in any day. I won't hold my breath.
What a ludicrous situation to be in, in the 21st century.

Note:
I did find one shop in Devon who had 3 cans in stock, but he was unable to send them to me, as the Post Office does not allow spray cans to be sent.
They can only be sent by courier.