Curious - if you add the registrations on the vehicles shown in the link in the above post, and that of the 432 shown having its turret fitted in one of the earlier posts, to my list you get 18 in total:
00 EA 63, 03 EA 43, 03 EA 48, 05 EA ?5 or 6 (or possibly FA), 11 EA 29, 17 EA 13, 17 EA 92(?), 01 EE 27, 01 EE 84, 01 FA 05, 01 FA 38, 01 FA 75, 03 FA 69, 03 FA 77, 03 FA 81, 03 FA 84, 04 FA 38, 05 FA 47.
Either the number produced was greater than the 13 cited by most sources (which seems unlikely) or the turrets and associated equipment fitted to some of the original 432/30s were later transferred to new host vehicles, possibly because the original 432s were no longer serviceable.