OK, so first the DongleHider (1 device), now the DongleHider+ (3 devices, although I think many beyond the originally intended Logitech transceiver won't fit?). Can't wait to see what Gillette-style innovation the end of the month will bring!
Meanwhile, if you have dongle management problems on a truly grand scale, there's always something like https://www.seh-technology.com/uk/products/usb-dongle-server...