I saw questions on this elsewhere while researching the best way to change the rear wiper blade on a 1997 Honda CRV. I didn’t need to go to the dealer for the nonstandard wiper arm hookup, I bought a replacement Anco rear wiper blade AR-12E (300mm) at Wal Mart. It comes with the whole blade, so I removed the inserts from each, and slid the new insert into the existing wiper blade.
The old insert didn’t come out easily, I used a bolt cutter to get it out. But the new insert was easy to put in.
I probably could have found a replacement insert (sans blade) for a little less but I didn’t know things were different until I got the blade home.