Pascal,
I have been using a Leitz Pradolux RT 300 with a Leica Super-Colorplan-P 90mm for about 20 years. The RT 300 was the first Leitz projector designed for Kodak round trays. I should mention that here in North America, more than 90% of slide projector users have traditionally used round trays (which until recently were plentiful and relatively cheap).
Kodak USA has indeed stopped making and selling slide projectors (and slide trays!). As for Leica, the projector divisision (which they bought from Zett Corp) was sold about a year ago (I would tell you to look at past press releases but they're no longer available in the new web site ...) to a company in Germany, which promised Leica to continue making the traditional Pradovit projectors (P300, P600, etc..) with the straight trays. I believe the new company was called leica-projektion.com and later changed its name to
Zett Optics - Lichttechnik, Feinwerktechnik, Kunststofftechnik: Leistungen_. There was a thread on this in the old Leica forum.
A word of caution about choosing the P2002 over the RT. I may be wrong but I believe they do not use the same series of lenses and that the latest and more advanced "PRO" lenses may only be used on the RT (e.g. the 90mm Super-Colorplan-PRO, the 150mm Elmarit-PRO, etc..). The older "P2" series lenses were designed for the "P" series projector (P2000/2002, P300, P600, etc..).
BTW, when buying a Leica projector lens, make sure to specify to the salesperson whether you are using glass or glassless slides. Hope all this helps.
Good luck,
John F