I just found the production data...
From page 1.
<div class="ubbcode-block"><div class="ubbcode-header">Quote:</div><div class="ubbcode-body">In 1972, for whatever reason, Pontiac would not allow you to build a GTO Convertible. Judges were removed from the option list mid-year in 1971 so to build a real top flight Pontiac - you had to know your way through the options sheet. Production of HO convertibles was low with only 33 total being produced. Of those, 7 were Lemans GT's and 26 were Lemans Sports. We only have a breakdown on the GT production with 2 being built as 4spds and 5 automatics - no breakdown on the other 26 exists, but using the same ratio we could expect 8 4spds and 18 automatics, similar in ratio to the 70 & 71 Judge convertible production. According to Dan Jensen who's been tracking these for a few decades and Jim Mattison at PHS only 12 of the total 33 are known to exist - 3 GT's (all automatics) and 9 of the Sports, 5 of those being automatic and 4 being 4spds.</div></div>
This page shows a total of 16 M22/LS5 23867 models being built - with 2 of those being the LeMans GT's that would leave a production of 14 LeMans Sport convertibles. So, out of the total production of 16 or 14 depending upon how you split it, 4- 4spds have survived.
