I have thought about making a nice chromoly tubular core support. Pretty sure it would not pass the factory stock appearing rule unless otherwise specified rule for TSM. I am sure the aluminum one would pass no problem.
I have one that I will let go for $300 only because I really don't want to let it go, probably out of your price range... I sold my other one a few months ago, cost about $50 to ship from Chicago to Mass. IIRC