I did some digging and found
these guys. Their inventory list said they had one 725-3770 in stock, so I gave them a call. Apparently that's a 5 year old inventory list that no one was aware still existed...but they still happened to have a 725-3770 in their warehouse so I managed to snag it
Pretty sure that was their only one, but I didn't ask if there were more so if anyone else is looking for a 724 then you might possibly have some luck there. Locking this thread now.