[pct-l] backpack repair sources?

[Clayton Dewberry]

I picked up a Lowe backpack that is old but in reasonable condition.  The shoulder straps are in good shape but the foam inside has hardened and is crumbling.  I contacted Lowe and they don't offer replacement items for their "older packs".  Anyone have suggestions for repair/replacement sources?
 
I'm in SF Bay Area, but could mail out.
 
Thanks,
-cjd
Clayton