Product Designer / Industrial Designer for Foam Mat Cover.

I’m looking for a product designer with experience in soft goods/textiles to help me develop a new product idea. The product is a removable, washable fabric cover for large foam play mats (around 2m x 3m). I have a pretty clear idea of what I want the product to look and function like, but I need someone who can help work out the technical side. Things like the construction, fabrics, pattern, fit, elastic/stretch and how it can be manufactured ect I’d also like help creating a prototype and eventually a detailed tech pack that I can give to a manufacturer. Ideally, you will have experience designing sewn/textile products and taking them from an idea through to prototype and manufacturing. Please send me examples of similar soft-goods/textile products you have designed, and let me know your experience with tech packs and prototypes. I’m looking for someone who can really help develop the product, rather than just create drawings.