I’m looking to find where I might buy different size “wheels” that hold an object in a roller based rotary. My current setup doesn’t allow for conical objects like some glasses are.
If you have a makerspace nearby or desire to contact an online 3D printing service, you can have wheels made to your specifications.
Do they use O rings on those wheels?
A picture could help. 3D printing is a good choice, but at least we would need to know how they are attached to your rotary.
McMaster carr round Grove pulley
Harbor Freight sells assortment boxes of O-rings. Pretty easy to custom make wheels of whatever size you need.