Derik,

You can use tape. Most of the reel seat arbors that I have seen are geared towards the casting and spinning guides, but you might be able to find one with the correct diameters. A lot of people use masking tape. I use a fiberglass reinforced filament tape. It's a clear tape that has glass fibers running down the length of it.
I make three little arbors; one at the front of the reel seat insert, one at the back, and one in the middle. I make sure to epoxy both sides of each of those little arbors cery well.

Maybe others have some good ideas and will share.

Brian