Retro T-Shirt Designs for Peptide Brand

I'm looking for a talented designer to create up to 15 retro-style T-shirt designs for brand promotion in the peptide market. We'll start with two designs.

Requirements:
- Use of existing graphics I’ll provide
- Follow detailed design specifications I’ll provide
- Retro design style
- Color scheme based on my general guidelines

Ideal Skills:
- Experience in T-shirt design
- Strong graphic design skills
- Ability to work with provided graphics and color schemes
- Creativity in retro design themes

Please include samples of previous work in your bids. Looking forward to your proposals!