I presume you mean the lower ones... ie on the wishbone (or whatever its called LOL)
I think your best bet is to get some fabricated.
I believe thats what Bstardchild did with his Monza ones (which are the same as the senator A AFAIK!)
Most metal fabrication places should be able to do it I reckon. You could always PM Bstardchild and see what he has to say