Paul
Thanks.  It is a wiper technologies product, as I finally found the label and part numbers.   I’ll call them Monday.   For now, I’ve improvised and was able to bore out with a step bit a true vision arm I found at an RV shop in Calgary to fit, albeit with a smaller blade.  But it works.  As it is the splines were stripped so I have several problems to deal with.  
Thank you for all the help.   So far in one week I’m having a blast fixing everything I can 

.  Wiper, Slide Seal, Busted door switch for the Washer/Dryer, broken Fantastic Fan, Cracked fridge water reservoir, bad Black tank valve, motorized blind, broken slide topper….. not complaining at all.  Been a great ride so far and it keeps my problem solving skills intact..  as always thankful for the thoughtful help here.
Anand