Electronic Distributors From Rick Ehrenberg
So after spending a little time searching and studying it seems this particular distributor is a slightly modified Chinese made WPS branded item. This picture from the eBay listing shows the part number printed on the dist. body: "dst3890" which is a WAIglobal part number. Likely changed out springs, riveted cap clip bosses so they don't fall out is about the only mods I can see. A WAIglobal version can be had for about $55+/- depending on a multitude of sources. So an additional $55 for a total cost of $110ish for those two mods unless it also comes with a US made pickup or quality cap and rotor which is unlikely. Highly doubtful. Cleaver ad though, makes you think he gave directives during manufacturing and setup!