Thanks for the feedback Chiradool. What about 80x80x4? We have used this before in STT so it should be available. Could you please confirm? 
Not many profiles available with 80mm width in your table below. Could you please check further options for “XXX x 80 x X RHS”? I can only see 160 x 80 RHS in your table at the moment. 
If you could also let us know the list of channels (UPN, ..) you can purchase that would be great.