There is a guy on Delisandri street in League City, Johnny Vykukal 281-381-4313. He has not done any work for me personnaly, but I have read some good feedback about his work.You decide for yourself.
Might try Mickey's Marine in LaMarque. He still does trailer maintenance. Used to build them many years ago. Took care of me when I needed new springs.
Coastal Backwater Marine in Santa Fe can help you out. 409-927-1462. I bought my trailer from them and when I didn't take care of it, they repaired what I had done to it. Good people down there.
A "little birdy" told me Evans Marine in Bacliff is gearing up to tackle trailer repairs. Call Bryan at 281-559-BOAT to see if he can help you out.
Was over at Evans Marine last week, one of the guys that worked for Brian said that's what he did there, so I'm sure they are doing it now. You should check them out.