77 Trimate Trailer advice

[77trimate4]

I have a 77 Trimate 4 that i was thinking about a new trailer for. It has an old 2 bunk (one on each side) and 4 center rollers. I was wanting to get a "prestige style" with just the bunks (no rollers) Does anyone have any advice on brands/models? Where can I find the measurements for the hull to have a trailer set up for the boat?

Thanks
Derek