I think I remember those red anodized retros that went for auction at ebay maybe about a year ago. There couldn't be too many of those around and the color anodizing must have been a one-off run by either Simplex or a bike manufacturer to put on a specific bike model that needed red shifters. I have a pair in anodized black. I have only seen one other pair in black so far. I'm trying to figure out what bike I might use them on. Problem is, all my bikes are black or grey and I'd prefer some sort of contrast with the shift levers.
Really nice Palo Alto BTW, I still remember recieving Palo Alto catalogues in college during the 80's with those bikes in them.

Chombi