Rock Sorting Excavator Bucket Design

I need a specialized excavator bucket designed for sorting large rocks and stones (6-10 inches) of mixed varieties.

Requirements:
- Custom design to fit standard excavator models
- Durable materials to withstand heavy use
- Efficient sorting mechanism to separate large rocks from soil and debris

Ideal Skills and Experience:
- Experience in designing excavator attachments
- Knowledge of material durability and heavy machinery
- CAD design proficiency

Please provide examples of similar work.