Build Working Audio Electronics Prototype for Phone Case Product

I’m looking for an experienced hands-on electronics/prototype builder to create a rough but functional demo model for BaseKase, a phone case product with built-in audio amplification and a required wood/acoustic component. The design will be provided, but you have creative freedom over the build methods. The goal is to build a working investor/demo prototype, not a polished consumer-ready product. The general design direction is as follows: the prototype should function as a phone case assembly with raised grip ridges, integrated audio electronics, and a wood/resonant panel element that is part of the physical sound and enclosure structure. The prototype can use off-the-shelf electronics, including a small amplifier board, rechargeable battery/power module, etc. The enclosure will likely involve a combination of 3D-printed or hand-built parts, with the wood component integrated into the assembly. I need someone who can physically assemble, troubleshoot, test, and ship a working prototype. Please do not apply if you only provide CAD files, renderings, or schematics. I’m looking for someone with hands-on experience building small electronics prototypes, audio devices, battery-powered products, speaker/exciter assemblies, and/or rough physical product demos. Deliverables should include a working prototype, basic wiring layout or schematic, parts list/BOM, build photos or videos, notes on what worked and what should change in the next version, and the final prototype shipped to me. Contact me about pricing. This is a milestone-based project. If the first prototype goes well, there may be follow-up work for a cleaner V2 model. Please share examples of physical electronics prototypes you have personally built, especially if they involve audio, speakers, battery-powered devices, wood/acoustic materials, or small consumer product enclosures.