Looking for a white 20" tire 2.125 or wider, street tread

I'm trying to find a 20 inch tire for my sidecar in all white or cream. It needs to be at least 2.125 in width, but 3.0 would be very good. I have found NOS 3" wide Schwinns, but am afraid of checking in a 1970's tire. Prefer new, recently made with a street tread. I think a knobby would behave badly on a sidecar. Anbody have one or know where I can find one. None of the usual suspects seem to carry it.
SB

Kevlar,
Thanks for taking the trouble to look. I saw that and may have to go that route. I did find one in a 2.125 width, but the tread is more like for a BMX and I think would be a rough ride and might make cornering more difficult. I really don't know what to expect with a sidecar having never used one, but I figured a street tread or slick would be best. Not many options in white. But I'll keep looking.
SB