We don't stock them do to lack of interest and that the rear pull-off isn't needed on those models.
At most I get an inquiry once or twice a year for them, and we don't use them on any of the later carbs we build here as custom units, just the front one.
Many of those will also have a bleed hole in them so them come in slow, which is a vacuum leak and sucks in dirty unfiltered air......Cliff