That pole is same thickness as the one you have installedI have put these in my basket :
TK12 12 inch Stand Off Bracket ( pair)- Galvanised
6 ft Alloy TV Pole / Mast - 2 Inches.....16 gauge Aluminium
M10 Anchor Bolts x 5
Pretty sure I don't need anything bigger than 12" T&K brackets but was a little unsure of the mast being only 16 gauge Aluminium. Was considering a 4' scaffold pole but the price is ludicrous. Any thoughts before I order??
Will likely delete the anchor bolts and get them locally for cheaper instead.