Great idea !! I just went to Pet Smart and they don't have a toy like that... but I will continue to search for one around other pet stores!
We used Nylabone teething keys... I would put them in the freezer for a a little to get them cold and he would take to them quick
I used the same toy for Wally. He loved them so much I had to replace them 2 times. Good luck! The biting stage will stop. Hang in there.