Northern California - Looking for a bike shop in the East Bay that carries parts for older bikes

I have a Trek 930 from the mid-90's that needs a new rear shifter/brake lever and I wanted to swap out the stem and/or flat handlebars to achieve a more upright riding position. Do you know of any bike shops in the East Bay and preferably closer to the Concord/Walnut Creek area that carry the parts needed to accomplish the goals I have mentioned?

Thanks...

I think most of us source '90s replacement parts from eBay sellers. There was a Tri Valley LBS that had bins of old parts you could pick through, they went of business several years ago.

In north Oakland, Recycles on Sacramento and Spoke Cyclery on Telegraph have old parts bins.

Give Velo Sport a try.

I usually buy complete thrift-store bikes or from local college bike-shops to find old parts. Usually spend $20-50 for a complete bike and end up with a tonne of older parts I need. Then I just fleabay or Craigslist the remaiming parts I don't need and end up making a profit.

Ebay serves all states