need wiper adapter

Hi- I've read on here about windshield wiper adapters that will adapt the saddle mount wiper arms to J hook type wiper blades. I have searched for this adapter, but cannot find it. I have found many others that are not even close. The adapter I need will have either 2 upright tabs or a block with a hole in it on the back of the J hook. The hole needs to be through the tabs or block and 90 degrees to the line of the hook for the pivot bolt.

Anyone know where to buy this adapter and an exact part number? What is it called exactly? I would call it a saddle mount to J hook windshield wiper adapter, but no luck with this search.

Thanks -- Mick