Realistic Eagle & Salmon Stamp

I’m creating a commemorative postage-style stamp that features an eagle with a salmon, and I need a detailed, realistic illustration that can scale cleanly from a small printed stamp (about 38 × 25 mm) up to poster size for merchandising... (Budget: $20 - $80 AUD, Jobs: Art Consulting, Art Installation, Digital Art, Graphic Design, Illustration, Illustrator, Photoshop, Vector Design)