Dont they make kits? Like the whole...take a plaster cast of your dick and a company makes a dildo of it?
I mean...there is a market.
If you build it. They will cum.
Edit: That didnt take long...its on Amazon.
Clone a Willy Make Your Own Dildo Kit https://www.amazon.com/dp/B00112IGCA/ref=cm_sw_r_cp_apa_ovctBbMF5TAXR
Edit 2: Mr Yeasty doesnt seem like the catchiest name for something going into a woman........now that I think about it. It actually sounds like the least desirable name in history for a dildo/plug.
But with the way this sub is tracking...there will be a market.
I use Boost for reddit which makes it very easy for me to make links and SwiftKey beta for my keyboard which has a "clipboard" allowing me to save texts.