Scott,
Whizzers are popular with the motorized bicycle crowd. Check out:
Motored Bicycle
They have a section on Whizzers along with photos, parts sources, and tech help.
The Barber Motorsports Museum just up the road in Leeds, AL. has about 10-20 restored whizzers in their collection. Seems Mr. Barber must have had soft spot for them. Next time I get up there, I'll get you some photos.
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Dave Morrill

Sylacauga, AL. USA.
1920s Harley Model J Racer
"Marble City Special"
1955 Harley KHR Replica
"It will break a hundred, if you drop it from a plane!"