Hello,
You could try a satellite dish, they have a az/alt bar to set them. Take the 2.5m dishes, they are are often free or under $30. Depends on how cheap you want to go, they would take a good load as well.
Steve
Ps. Similar to this one, 2nd photo is better for the alt mechs.
https://www.gumtree.com.au/s-ad/mcki...ers/1276710006