I didn't want the curved track business on my replacement. Also I didn't like the original curved support for the track on my E27. So...
I bought a 4"+1.5" 6061 channel from McMaster Car to replace the curved support 48" cut down to 46". The channel shape is faced downward (like lower case "n") with the track mounted to the horizontal flat back (webs facing downward).
I shaped a radius cut in the webs for the hatch (using a template, jig saw, die grinder and file) and had it clear hard anodized. Matched the finish of my winches perfectly. I mounted to the support a Harken 4:1 small boat traveler which has been working fine for the past three years. The small boat load numbers are pushed a bit for mid boon sheeting. However, I asked a Harken rep about my application and he said it should be fine. I reef at 18-20 which keeps the load down and put the second reef in at 25-35. No problems. It even withstood breaking the original boom on a bad jib. Boom was already bending in the middle and corrosion at the middle bail was obvious.
I probably have pictures some where to post later if you are interested. I believe it looks far better that some of the alternatives I have seen on other boats.