Tatey..... you need 2 CP15,s & 4 CP18
i,d hate for you to order the wrong amount of steel & only realise it when your steering support frame only has 1 support or that you might struggle to pass IVA with only having 1 seatbelt mounting
just teasing you.
as you know from your visits to my garage i made all my own CP plates .
again , well done on your build progress.
cheers
andy