Nikki vs. Kyosan Denki

Rather than clutter up prior threads on rebuilding the Nikki fuel pump, let me raise this question: can a Kyosan Denki rebuild kit be used for a Nikki fuel pump?

We have two great articles on the rebuild process, one from Arne in 2009: http://www.classiczcars.com/articles/fuel-system/rebuild-a-240z-mechanical-fuel-pump-r70/  and one from motivealloy in 2014 that is currently active: http://www.classiczcars.com/topic/50679-rebuilding-the-nikki-fuel-pump/ At least one of these articles stated the Denki diaphragm is "different" and will not work.

The Nissan P/N for the diaphragm is discontinued and NLA and in motivealloy's thread I recently asked where to locate the Nikki rebuild kit but got no answers.  In that thread, Darrel provided a link to rebuild kits from New Datsun Parts - that kit is for the Denki fuel pump and one that I purchased.  Checking the pictures below I pose this question: I know the Denki diaphragm and oil seal look different but are they different in a manner that makes them functionally unusable?

The primary difference on the diaphragm is in the fitting that locks in to the pump arm - doughnut vs. T.  The tab on the edge of the diaphragm has a different orientation but that is external, all other dimensions are identical.  The Denki oil seal is a boot that is a perfect fit for the Nikki body and is held in place by the diaphragm spring.

I've searched extensively for a Nikki rebuild kit but no joy.  So... here's the challenge to the experts: point me to Nikki rebuild kits or tell me exactly why the Denki kit will not work.

Thanks!