Thank you for your replies!!
It sounds like the easiest solution is to keep looking for old-stock shifters...
Or as you pointed out, the
Tiagra 4600.
Looking around, SRAM Red is for 10 speeds might be an option - and more compatible with Shimano components than Campy is? I might be able to find those new.
How does a Shiftmate work, where is it installed? Is just for the rear derailleur? I visited their website. If i understand correctly i would be using a shiftmate 1 between the Campy 10 shifter and Shimano 10 derailleur?
Could i pull off option 2 (new groupset) with a re-build of the rear wheel (new hub)? Would another (new) high-end groupset be a better option for me if i can avoid the wheel re-build? Maybe 11 speed?
Thanks.
And sorry if i opened too many cans of worms!
PS: I did have 2 different pro work on the shifters, with temporary results at best. One of them spent an entire day on them. So i don;t hink it's a question of WD 40. Though the cables might not be set well, i get the feeling this might be part of the problem.