I'm guessing that was made by the same people who made the Orange/Chrome Nichibutsu T-molding.
That's another of the holy grail items.
I just picked up a Radical Radial, in the original Nichibutsu cabinet because, while I could recreate the cabinet with no problem, I would NEVER find the T-molding for it.
Hopefully you'll have a bit more luck given the relative age of the T-molding you're searching for.