Cinghiale
You can also use the double short spring arm quivers.
Bear was doing some modifications on their existing quivers to accommodate the new compounds in 1970 rather than create a new quiver. The 8 arrow quiver that Shaun mentions above was a bit later and is a great quiver because of it's length. It was available in a 4 and 8 arrow model. Both brackets can be moved on the wire frame to position the quiver to suit you.
The early modified quivers were the short 4 and 8 arrow. What is the hole spacing on your inserts?
If about 9 1/2" then I can help.
I have a long 4 arrow new in the box, and a short 8 arrow which will fit the 9 1/2"spacing(pictures below).