I just called a local wheel repair company, as I have a slightly bent wheel too, and he said removing a lateral bend on a steel wheel is nearly impossible. He recommended purchasing a replacement, whether used or aftermarket.
Pioneer Rim and Wheel, Keystone also has a wheel repair service for classic number match rims. See if Larry could get a discount on it, won't be cheap.
We use Keystone at work, but it's almost all alloy wheels. I don't know of any steel wheel places. Best to call around. I think there's also Twin City Wheel and Alloy Wheel Specialists but you'd have to google search.
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Bryan-NW 'burbs 1972 Malibu Vaguely stock appearing, and the opposite of restored. 1999 std bore 5.7, Vortec heads, Holley Stealth Ram, GM cam 700R4, Viking coilovers, 12 bolt 4.10 posi, and a whole bunch more