Slim Case Accessory Attachment Design

I have a slim phone case and I’d like to add an attachment that will neatly hold small accessories—think cards, a stylus, earbuds, or whatever we decide makes the most sense once you review the design constraints. I need a skilled 3D modeler to turn this idea into a manufacturable CAD file.

Here’s what I’m bringing to the table:
• The exact phone model and case dimensions (including a STEP of the case interior).
• Basic sketches that show where I’d like the attachment to sit and how thick it can be without ruining the slim profile.

Here’s what I need from you:
• An initial concept rendered in SolidWorks, Fusion 360, or a comparable CAD tool so I can review ergonomics and appearance.
• Iterations (likely 2-3) based on my feedback to nail down size, grip, and ease of use.
• Final deliverables: native CAD file plus export in STL/STEP, ready for 3D printing or injection-mold tooling.

Key considerations:
• The case must stay as slim as possible—no bulky protrusions.
• Attachment should snap on or adhere securely without damaging the case.
• Allow tolerances appropriate for FDM/ SLA printing.

If you’re comfortable working quickly, communicating clearly, and refining small details until the fit is perfect, let’s get this modeled. Send a link to at least one comparable accessory you’ve designed and let me know which CAD platform you prefer.