Greetings Earl welcome to the Forum.
Sears used to carry several types of Chargers, but, that's been a couple years ago. Now, who knows, might check with them.
My 18v Charger is ok, but, the two Batts that came with my B/D Drill went bad.
I bought a REAL cheep Drill that was selling on TV. Got a new Charger and Two new Batteries for $19.95 +s/h ! Can't remember the Phone number for them, sorry.
It just happened that the new Drill had the same "D" shaft on the Battery's that mine did, and I guess I just lucked out.
My best offer.
Have a good Day !
S.W.