There are a lot of cheap
control models like this on ebay.
I think I paid something like $15 for 2 hand units and the base station. Very easy to install as no wires to the hand unit. The base unit runs from 12v so you just tap into the solenoid wiring
A couple of reservations:
1.They are cheap
Chinese make so if this is your only means of operating the winch
I would get a spare, including another base station.
2.The wireless pulse means that with only a brief press the minimum operation is a second which is a bit long to snug the anchor
home in little steps.