If you want to try the commercial option, just choose one of those suppliers above and order directly from them via their website or phone number. That will be the fastest and most straightforward method for testing that product.
If the commercial product doesn’t work out, or the cost is too high, the next step is to find a volunteer maker to design an open-source / DIY version. In that case, you as the requester would be responsible for covering the cost of material and shipping of the DIY version.
Collaborate with makers in the community to develop your device idea.