Hi Wojtek,
Multiplex no longer make the Jumbo Digi V2, but now make the Jumbo digi. It's the same servo updated a little. I must say that it is unlikely that Mpx will phase these servos out in the near future and even if they do, spares will be available for years. They have just phased out their 3030 Tx because the chips are no longer available, 18 years after launching this radio, so I doubt if this will be a worry. I can really recommend Mpx servos, I use nothing else and I have never had a failure. They are built to military specs so they are very robust.
However, I completely agree with David regarding the use of analogue servos on your flaps. I think you have your logic backwards on this one since a flap at neutral should have no load whatsoever. Whilst it is under no load, the only current draw is the quiescent current (very low). Moreover, since the real worry is flutter, provided the linkage and hinges have no slop (on a Tom Cook Model, what am I saying?), then a digital servo will provide way better flutter resistance than an analogue one.
Regards,

John