"One of a Kind" bags, or OOAK for short, are sample prototype pieces created by Dooney & Bourke but were never mass-produced. Since they are so rare, OOAK bags are not available for sale except through secondary marketplaces, like eBay.
Here are the known OOAK bags from the Best of Mickey / Mickey Mania (Body Parts) Collection:
Body Parts Kimberly Crossbody OOAK
This color scheme of this Body Parts print was never mass-produced, making this crossbody bag a OOAK.

Body Parts Kimberly Crossbody OOAK – Photo by Olivia D.
Body Parts Snap Wristlet OOAK
A wristlet style was never released to market for this collection, making this snap wristlet a OOAK. This item first appeared at the Walt Disney World Resort sample sale in April 2015.

Body Parts Snap Wristlet OOAK – Photo by ebay seller mae5731

Body Parts Snap Wristlet (back) OOAK – Photo by ebay seller mae5731

Body Parts Snap Wristlet (open) OOAK – Photo by ebay seller mae5731
More OOAK Disney Dooney & Bourke bags
- OOAK Aulani Brown Leather Sketch
- OOAK Balloons
- OOAK Blue Mickey Faces Denim
- OOAK Brown Leather Sketch
- OOAK Colored Sketch
- OOAK Comics
- OOAK Disney Cruise Line Colored Sketch
- OOAK Disney Cruise Line Disney Dream Inaugural
- OOAK Disney Cruise Line Sketch
- OOAK Flower and Garden Festival 2014
- OOAK Mickey & Minnie Names Italian Leather
- OOAK Mickey & Minnie Rainbow Names
- OOAK Mickey Colored Nylon
- OOAK Mickey Stripes
- OOAK Mickey Tan Nylon
- OOAK Minnie Bows
- OOAK Minnie Canvas
- OOAK Minnie Mouse Canvas
- OOAK Minnie Mouse Reverse Black Canvas
- OOAK Overview
- OOAK Peace Love Mickey Denim
- OOAK Pop Princess
- OOAK Silly Band Mickey Silhouettes
- OOAK Tinker Bell Canvas
- OOAK Tonal Mickey
- OOAK White Sketch Nylon
- OOAK White Sketch v2
- OOAK Wonder Mickey Silhouettes