[Aussie Mike]

I've got a pipe bender you can borrow Michael. I spent a lot of time with a die grinder on the dies for 32 medium black pipe and it does a respectable 90 degree bend with little distortion.

32 medium black pipe is pretty good for a roll cage as it's 32mm nominal bore with a 3.2mm wall thickness making it about 39mm OD. Ive got larger dies but the are for imperial pipe sizes.

Cheers