Well they do need deconversion but that shouldn't be too tough. They're nothing more than rebranded skeeballs. Buy an original marquee here or on ebay and repaint the blue parts yellow. I haven't done it yet but I do have an original marquee waiting for when I have the time.
I would have loved not to have to deal with that, but after looking for a skeeball for a couple of years (only local one I came across was $1200 - too much for me), a buddy told me about Tilt selling a couple for $300 each, so it was a no brainer to me.