I have just placed an order with a German company for 250 galvanised steel markers with wires. Quite a lot more expensive than Paw Paw but with free shipping and no customs to pay. They had a couple of other items I wanted, at good prices, so I decided to stop prevaricating and go for it...
If I like the markers I can reorder (I'm afraid that 250 won't be enough, but the price doesn't get any cheaper for larger quantities).
Now to find a good value p-touch printer...