Why are there literally no dildo mounts capable of Bad Dragon toys

I just want something to mount my toys to, yet I cant find a single dildo mount that isn't limited to 3", so rex and XL chance are bigger that 3. why are there so little options out there for dildo mounts?

 

I have to make a new mounting plate for my chair for that exact reason.
But I dont think any mount could exist for my XL Pretzal or Luka ^.^

 

If you dont mind getting a little DIY I could assist you in making one. And what does it need to mount to?

 

I just want the toy to have something to stick to and not move. all I have is my door frame and the bathroom walls right now. I'd like something I can put on the floor, stick the toy to it, and go ham without it lifting off the ground.
has to fit an XL chance.

 

Hmm well I've seen people buy a suction cup shower handle and attach them together with some kind of soft rope or other cordage. Something I've had good luck with is taking a towel and using one of the long edges to lay over and kind of wrap around the balls of chance. Then you can just use your feet or knees depending on how you ride to hold the towel down. If that doesn't make since I can take a picture. Also if it wasnt obvious the towel thing only work on the ground.