Good point Ken S. After reading your reply, I wanted to clarify what my meaning was.
There is a big difference between "aftermarket" and "custom". Steer clear of "aftermarket one-size-fits-all-with-some-bunk-modifications" trailers. That is not what I'm talking about.
I was referencing a full custom replacement trailer, built for YOUR boat at the time of purchase. It's not a 4 day job. It's going to take several weeks at a minimum, plus a boat "fitting" or two when it's ready.
The company that rebuilt my trailer took my boat off on a lift, and put it on carpeted skids while the trailer was being rebuilt. They adjusted them as my boat was being lowered onto it. One of my biggest problem areas was the L shaped flat bar brackets that were welded in place to hold up each bunk. Several of them were rusted to the point I thought they were going to break at any moment. My wood bunks were also in need of replacement. They cut off the brackets, cleaned everything up, welded new ones in place, then blasted the entire trailer to bare metal before galvanizing it. There was a couple day's period when my trailer wasn't at the shop at all. They don't have galvanizing equipment in the shop, so they sent it out. Basically, they "built" me a new trailer with the basic outside of my original frame, axle and two tires as the only original parts that came back. They replaced:
All bunk brackets. All bunk boards and carpet. Rearmost cross brace (and modified the design - my drain plug was draining right on top of it). Both fenders / fenderwells - replaced boards, carpet, stripped old fenders and added diamond plate to the tops and steps on it They stripped all the wiring and brake lines from it, as well as removing the axle before sending it out. When it came back, they reinstalled the axle (already galvanized - it was a replacement axle from Portsmouth Trailer a year prior), re-ran the brake lines, and installed all new trailer wiring from front to back. I also had them put new LED lights all around. Figured since I was basically getting a new trailer, I'd do it right.
I don't recall the exact price, but for all I got done, I considered it a bargain compared to a new trailer, which was double the price of what I paid to get mine rebuilt. Not sure of either number, but I do remember it was half of a new trailer to do all my repairs / upgrades.
My next boat came with a galvanized trailer from the factory (Triton). I wouldn't have it any other way.
All the best,
Glenn