I've never seen any static semaphores from Germany, but tha doesn't mean they don't exist.
The cheapest I have on my DB Eisenbahn is around €50. But they are powered for that price and easily hooked up, but depending upon the method used, are not that reliable. The solenoids can also easily be burned out by a stuck relay or magnetic reed switch. I've already smoked one of them and now it is static. The other works, but I disconnected it after fusing a relay contact, I did get the plug pulled before it burned up the semaphore solenoid.
Anyway, I've about given up on semaphores until I can come up with a more reliable actuation system.
Modelbahnshoppe-Lippe is about the best in Germany for price, selection, and speed of shipping. From Germany to my US doorstep is usually three days, sometimes four. Customs is handled by UPS so there is no delay.
I cannot say the same for Union Modellbahn. They use DHL with no Customs brokerage, so you will be dependent on Royal Mail and the Government for Customs processing. I'm not certain how speedy UK Customs is, but if it's anything like US Customs, you will be waiting weeks to receive your goods. Their shipping is also €20 higher than MSL (to the States), and their prices are also higher for the same equipment and parts. Their customer service though is excellent and shipping out the door is usually the next day. It's the courier and Customs you have to put up with.
I would only order from Union if there were no other resource. There is no choice of shipping with them so you are stuck with DHL.