Line lock options

My favorite was a Dico (might have been Mico)trailer brake. I bought it in the eighties at the OCIR swap meet for $35. Set the brake, it would hold till I kicked the brake pedal. Didn't need to hold the momentary switch.
When it finally died a bit ago, after 35 years, I went to get another. No overhaul kit I could find, a new one was $550.
Okay, something else.
Bought a summit version. I haven't installed it yet, doubt it will last 35 years.
Bought a version from Jegs a few years ago for a different car. Leaked fluid like mad.
For a recommendation? I would suggest the Hurst.