Selling Niche Physical Products with Affiliate Commission

Sorry for the DP in the main forum.

I apologize if this has been posted and answered, but I cannot seem to find the exact answer for my circumstances. Only ones for digital products.

I have a niche physical product that I am looking to sell that is used in cheerleading gyms. It is a piece of sports and development equipment. To encourage a grass roots push of this equipment I want to setup a situation where a cheerleading gym could have their own personal link they give to their members to purchase this product (and eventually multiple products). When the athlete purchases this product they enter in their shipping information and pay through the link provided by gym (I would call this an affiliate link, but affiliates only seem to deal in electronic products). The gym gets a nice hefty commission and their end of the deal is done. I collect my portion, get sent shipping information and a label, put it on the product and send directly to the customer who purchased the product. The gym themselves only has to get involved as providing the link and pushing the product. We would then all receive our money ideally through paypal.

I am having lots of trouble figuring out exactly who can handle this type of situation. Physical product affiliate selling that works through paypal seems to not be a very common practice. For the ones I want to sign up for to try it they are asking for tax information before I know it even works. Help Warror members! What do you recommend? Thank you!