If you are finding a good place to get BMW EWS HU58 remote from, and not too bothered if they’re remanufactured, as long as they work okay. Why not just order from china.
I buy tools from obdexpress.co.uk and also bought 2 remote keys for BMW EWS and they are in very good condition and working well. Last 2 packages came in 10 working days via China Post. You can order via DHL and get it faster.
Link contain remote 433MHZ HU58 for BMW EWS
They offer 315MHZ HU58 for BMW EWS as well. I search it out for you here: