Hello from Massachusetts - 

Well, you could always fix it with a 2lb sledge to the middle of it.

Honestly, I don't know.

NAPA only sells an offset for added "chamber."

Some ham-fisted alignment guy did that.   Those things will not bend like in normal circumstances on the car.
Personally, I would put it in a press and press it flat, and reuse....but that's me.

Camber is the amount the tire leans in-out at the top. Caster is the inclination of the centerline between the top/bottom ball joints. All cars use a positive caster...the more caster, the better the straight-line steering, but more caster also adds to the steering effort, since the tires want to stay centered. Look at the casters on the front of a shopping cart....or notice the front tires on a Top Fuel dragster. Anything much past center, and the wheels will "flop" to one side, and be almost impossible to straighten out.

Camber is adjusted by moving the entire control arm(front-rear) in-out the same amount. Changing camber does not effect caster.
Caster is adjusted by moving only the front or rear of the arm in-out. Changing caster DOES effect camber...it's a vicious circle.

I've never seen the need to go much(if any) out of the factory specs for front end alignment on a street driven car. If you're doing some Gymkahanas, Autocross, Solo1, or road racing, yeah, there's work to be done in the alignment department. Otherwise, I just don't see the need....but that's just me.

Thanks again for the help. I looked at some of the suspension kits but those were quickly removed from consideration after I blew a large chunk of the budget on re-coring the corroded and leaking radiator. I'll have the local hot rod shop press that control arm back flat and keep it stock.