I had the same type problem last year. I found out that there is no standard in the industry on retainer height. I ended up with a set of Howards +.100 retainers, and +.050 Manley locks, and lashcaps. I had 4 different sets of retainers and 3 sets of keepers in my hands by the time it was done. You can try and call several different outfits and tell them what's going on and ask for 1 retainer from each one to see which one will do the job. Dave