Stroke is a little long but... might be modifiable... Rieco Titan Camper Jacks
Couldn't find any, seems pretty solid but wouldn't know till tried, would have to take the legs off the tripod or find another piece of pipe and drill out both or weld. (I need this jack so can't tear it up )
If memory serves correctly, the brand name that I remember on the hand cranks that I saw was "Fulton".Maybe in Canada they still sell real trailer jacks? If anyone has a brand name of a well made one, please advise.
I have a small motor that was burned out when I got the dish. I removed the motor and placed a vice grip on the protruding flat piece of the metal sticking out. Works perfect, and then marked the arm with pencil where the sats are. That dish usually stays on one sat for long periods so no reason to move it often.i suspect if you have a bad actuator , you could take the motor off and use some threadall and make it manual crank.
The hand crank model shown is no longer made. They can fab one from their standard actuator at a cost of about $200.Noticed that Venture Manufacturing Company has a hand crank actuator pictured on their site.