I can offer a little help here, I think.
02R done by Lanzante for Jake Ulrich in June 2000.
03R done by Lanzante for Christian Glaesel in February 2013.
05R done by Lanzante for Ray Bellm and partners in April 2012.
06R done by a third party for David Clark prior to June 2005.
07R done by McLaren Customer Care for Larry Kinch in August 2000.
08R done by McLaren Customer Care for Sheikh Abdulla prior to March 2005.
10R done by McLaren Customer Care for Nick Mason in December 1999.
11R done by McLaren Customer Care for Tom Bryant-Meisner in March 2002.
12R not certain who did the conversion, but plated and driven to Le Mans in 1997 by Ray Bellm, so just prior to that.
13R done by McLaren Customer Care for Detlef Hubner in October 2006.
14R done by McLaren Customer Care for John Studholme in April 2001.
15R done by Lanzante for Roald Goethe in October 2013.
16R done by Lanzante (I believe) for Ray Bellm in August 2002.
19R done by Lanzante for Richard Smith in April 2015.
21R wears a plate from the Jersey Islands, but apparently was never actually converted.
27R done by Lanzante for the Leadley family in July 2012.
28R coming soon from Lanzante.
>8^)
ER