5 speed parts availability

["gregs672liter@netzero.net" <gregs672liter@netzero.net>]

Greetings list.  Since Shasta I have noticed more noise coming from my gear box 
under load and particularly when decelerating, most noticable in 2nd but 
present in all gears... sounds to me like bearing noise.  Anybody know what the 
availability of 5 speed parts is like, particularly bearings?  This is a servo 
box.  The box has newer sychros n stuff and the gears should be fine (keep 
fingers crossed) as it was gone through a few years ago.  Thanks for any info.
Greg Burrows