Any of the Logitech Harmony remotes will work with Wadia. They've recently been discontinued but you still might be able to find one new.
Wadia 521 Remote
I’m in need of a Wadia 521 remote. The original is not functioning properly and cannot control the DAC as the buttons do not function as intended.
I’ve reached out to the obvious , Wadia, but to no avail.
I’m looking to get a few DACS to compare but need the remote to perform this comparison.