[Kenwood] Kenwood TH-21 Battery

[Ken]

   I have a TH-21 that has broken batteries.  The plastic case is broken 
on them.  Would anyone know were I could find the battery cases?  Either 
PB-21 or PB-23, doesn't matter if the inserts are bad, I'll replace them.

Thanks!   Ken     WA0SBU.