I couldn't stand to have lost out and found them again on sale at Dawson's Department Store again at just £6.50 with £3.95 postage, so I ordered 2 set just for best value. It says there are more than 10 left in stock and at that price I thought I'd share so everyone can get a chance at a bargain. The set I got was 21 pieces from a company called Lemax. Clearly there's at least two that are just a bit too big, they're the same size as my 40k outpost that got bigger! but great line of sight blockers for a Trygon!
Of course they weren't going to fit with my table so I decided to paint them - undercoating them all in Red Oxide primer and then repainting them in shades of yellow.
And here's the finished result: