I did a search of threads and could not locate any previous discussion of replacement brake lights -- the whole thing including the red plastic outer part as well. I met someone at a rally, and he said someone at a FMCA rally was selling the whole kit as described above which will match up with what your coach has for brake lights. Except the kit contains LED lights instead of the regular light bulbs of yesterday.
Can anyone tell me their own experience in doing this on their Beaver and where on the web I can order the whole kit to fit my 2001 Beaver Marquis?