Quoted from Zukram:Correct. The outer shell is molded fiberglass. The problem was the shell was fairly thin, especially along the sides, and was easy to shatter / crack. The updated lock downs I have seen are thicker fiberglass.
Interesting. This isn't the first time I've heard of it being hard for companies to have lockdown bars made. Something to do with the stamps/molds necessary to make them being either expensive or hard to find.