roller to bunk trailer--Who has done this?

[Starzofchaos]

I am in need of replacing my keel roller, it is tearing up the keel big time. You can see the pic of it in my profile where the roller sits at. I put that there to replace a broken pvc centering... thing. We thought it would be a good idea to replace it with a keel roller. It turned out to be a not so good idea. I like the bunk boards for the keel that tsubaki has on his boat, i just need to see them better or even find out who makes them.
One place wanted me to use a swiveling bunk board bracket to fit on there, but didnt say how I would attach it at or if I can angle it to fit the keel.
Any Ideas?