I recently replaced the rear hubs on my 1998 406 2.1td exec, whilst doing this I discovered that my O/S/R brake caliper has seized and will not slide in/out no matter what I do. So I'm going to replace it with a working second hand one, but I seek your advice as to which other 406 models use the same caliper, as I am not having much luck finding older 2.1's in my local area (Birmingham).