Aluminium Sheet 7075 or.....

[Mike73]

Looking to source some aluminium to make a car chassis. Been advised 7075 in a 2.5mm although getting hold of this seems almost impossible in a small 390mm x 100mm piece.

Advice please, do i really need 7075, need a couple of bends to put into the sheet 25 deg. If not 7075 what grade would you aim to obtain, any tips on where to get it from?

Many thanks.