Fleshlight Quickshot is often mentioned here on the forums. Don’t know how many variants there are these days. Check the official Fleshlight store in your region. There is also a Fleshlight Quick Connect sold to merge two quickshots into one if you want a longer one. Quickshots are rather short after all.
A TheHandy adapter for 3D printing can be found here (check the mega link): Quickshot-Handy Adapter
Someone came up with a solution on how to create a strap for a quickshot using velcro. With the tube option it allows to connect two quickshots without buying the official quick connect as I understand it. Craft a velcro tape loop to hold the fleshlight quickshot in a tube