only one of the noltec bushings failed, it was an odd color when it was put in, all the other ones are fine after 4 years, that happens sometimes with badly mixed resin.

anyway, i figured out what the deal with those bushings is, it's a ford mustang panhard rod bushing ( pretty much any year 1980 - 2000 ), you take the metal sleeve off the smaller of the 2 that come in the box, then cut 1cm off the center metal tube, and there ya go... getting them in without a hydraulic press is a bit annoying.

they are not 'obsolete' or unavailable just described strangely in the aftermarket parts listings.