Vintage Mavic wheelset maintenance questions...

[Berzin]

I have a set of Mavic Heliums and a set of Mavic Cosmic Pros (the ones with the aluminum rims) that are still in great condition (the Cosmics are actually brand new and just waiting to be ridden) that I want to continue using but I'm a little concerned about not having spare spokes in case of a breakage.

If anyone knows where I could source these it would be a great help.

Also, what would I need to do to maintain the hubs? Should I get new bearings for them just in case, or would a cleaning and lubing of the hub interiors be good enough?

[CDale09]

Also, what would I need to do to maintain the hubs? Should I get new bearings for them just in case, or would a cleaning and lubing of the hub interiors be good enough?

The bearings last quite a while so there's no need to buy new bearings. A regular cleaning and lubing is good enough. Make sure to use only mineral oil for the Mavic hubs.

[steel515]

What about 1990s hub? http://www.yellowjersey.org/mavic571.html
I took it apart but not sure how to get out the cartridge bearing. I tried a spanner but tight. (I'm not a mechanic).