I am pretty sure if you hunt around on here there are PDF drawings of that rollcage shown in the thread above.
The steel is around £15-20 a meter for CDS to the right spec... The bends must be rotary drawn or manderal bent to meet FIA spec which is the only reason I am getting it bent for me really.
If I was purely using it for track days I would defo make it myself. But I am was hoping to get a few races in 750mc RGB this year
