I would think so Dan, either some square tube or 90 degree angle iron...
its hard to gauge just from the pics, you would need to measure to see if the bolt holes from the dish face fall inline / outside of the mounts holes.
If not then some wider angle iron (say 50mm x 50mm x 2mm thick) would give you more freedom on the where to drill the holes for the bolts, allowing you to make it wider / narrower as required. Try to get it as central as possible.
ok thanks just doesnt make sense why i would need that as the brackets that came with it should work with it, but i will get the iron bar to test it first hopefully it will work, also it cant be to long otherwise it will effect the movement of the dish up and down