Rocking Chair Rocker Prototype

I'm seeking a skilled manufacturer to create a prototype of rockers for a rocking chair. The rockers should be made from polypropylene (PP) plastic, suitable for both indoor and outdoor use.

Key Requirements:
- Material: Polypropylene (PP) plastic
- Design: Durable and weather-resistant for indoor and outdoor use
- Functionality: Smooth rocking motion

Ideal Skills and Experience:
- Experience in plastic manufacturing and prototyping
- Knowledge of polypropylene properties and processing
- Proven track record in creating durable outdoor furniture components

Please include examples of previous work and estimated timelines.