Marauder
What's going on ? ,dealants, like you say are out of stock so I ordered a second unit from another alledgedly UK company at £4.99, order was accepted and despatched with email confirmation - from dealnts ! Seems to be a Chinese co with stocks held in the UK. All very strange.
Incidentally these units have 3V batteries in the read head rather than the 1.5V batteries used in conventional digital calipers. When fitting remote DROs to my mill run from a transformer I had to go to great lengths to provide a dual voltage supply 3V for the DRO and 1.5V for the read head. Anyone now wanting to fit a similar system can use these 3V read heads and run it from one of those switchable mini transformers.
John-Som