I can't remember who was asking about these, but I found a number of these for sale on ebay.
https://www.ebay.com/itm/M715-M725-M...72.m2749.l2649

I was quiet happy to purchase a pair and a spare for my truck.

This is one item that I couldn't find while I was restoring my truck.
At the time, the vendors that I asked, said that this size was obsolete.
Now I face the task of removing the wipers again to install.