Are you sure that the noise you hear is from feather clearence.I used the 8 arrow quivers for decades without that issue but I did turn the arrows for best fletching clearance.Also watch broadhead clearence.
Those quivers do have some vibration noise if not attended to.
My regimen for quieting the 8 arrow was:
1.Threadlocker on every screw and tightened.
2.Shoot silicone caulk between the two flat,aluminum pieces on the gripper.
3.Where the upper spring arm contacts theframe wires,use moleskin at any point of contact.
This will quiet those quivers.Without it,there was always some noise.
The Delta 7 arrow quiver is a great quiver and lighter than the bear if you have a riser with inserts.You should be able to find them at 3R and other dealers,marketed by Bear for the Custom Kodiak.Just not called Delta.
Personally,I would drill the SK.There are other good quivers by sponsors here like EFA and Kanati with different attachment systems for different setups.