3/32 is a pretty big fiber optic. I think the biggest one on archery sites is a .029, which converts to a little less than 1/32. You may want to post this in the gun section. Not too many archers or archery shops carry that big of fiber optic.
I called MARBLES they want 2.95 for the fiber rod and 4.00 bucks to ship and handle now THAT GREAT CUSTOMER SERVICE
The rod must of came loose at the range never did notice it until I clean the rifle.
Not much to say about that company customer service