Cannot find wiper arm clip

Hello all.
I have a 1975 dodge dart sport. I only have one wiper right now due to the fact my wiper clip broke. I cannot find anywhere to buy another one. If anyone could shed some light on my situaion i would be very happy.

The clip fits onto the end of the flat metal wiper arm. the wiper blade then clips into this clip. Like an idiot i broke the clip. ](*,)

thanks
steve