Hi, Its taken a while to post this. Just before Christmas I picked up a pole box made by Tong Metal in Brisbane.
Cost was $484. Pretty bloody happy with that.
I've attached it to a back frame with 4 tek screws and also used the old hangers I had from the PVC holders to secure to the draw bar. I may end up using 2 more of these for peace of mind. It ain't gunna move either way. Alos used some Sika to help secure.......Anal yes, but dont like the consequences if it moved.
Cheers
Mark