no problemo... now campy bearings is were its at.... i ran the old record sq taper and it had 10k... no issues at all.... the newer UT has bigger bearings so should last even longer... mine i would s'pose would have about 4k on them... i recently needed to reinstall them due to a cracked frame... and they were perfect... not even close to needing replacement...i'd have a good look at them at about 8-10k... i also race this frame and mash up hills and am heavy for a cyclist...
so yeah... i have about the equivalent of about 10 yrs use... u don't need back up bits.... u don't need a veloce crank for parts... the spindle is not the bearing package a la shimano... u need a shop to pull the cartridge style bearing and re-install.... so wort comes to worst, u just need the bearings... as is the norm w/ cartirdge, its prolly an industrial standard size, or there are lots of aftermarket manufacturers willing to make it into one...
in any case, campy is pretty good with NOS parts... u just need the pqart number from their tech docs online and ur lbs can order it... their prices are fair considering.... u can even now get parts for old discontinued ergos... i recently had to rebuild mine b/c a spring broke on my non QS 2005 chorus ergolever... cost: $5... so no worries there...