OK,
here is WinUAE 0.8.23 with Drive Click emulation... Enjoy...
Hopefully, when it's been tidied up, it can be added as a core option in winuae... (lots of work till it get's that tidy tho)
What's probably needed is an option to enable and disable it for each drive, cos at the moment, when it's on, it's on for all drives, and that noise does get annoying when you've got 4 drives setup, and three of them are empty!