Thought I'd just update this thread. If you do buy a Alko ratchet wheel, make sure you disassemble the axle and lubricate the bearings as it does not look like Alko bother. I did not do this and the darn thing seized before we got hitched up last time and it took an hour or more to get out of the carport as it was not in a good place.
I pulled it apart when I got home and the bearings were dry and rusty and had collapsed and jammed. The bearings were only $7.70 each plus another $10 for some boat grease. However, the first one was a B$tch to get out and in the end, I had to cut it out on the lathe. Once it was out of the road, the second one was easy to knock out with a socket.
To lube the bearings, all you need to do is to remove a split pin and the axle will pull out. Give the needle bearings a clean and lube with boat grease and reassemble.