I have a tow rax wheel chock,
brand new $30
Can't load image but here's a link to product
https://www.etrailer.com/Wheel-Chock...ax/TWSPWC.html

Also have a set (for 2 bikes) of trailer restraint system for cruiser type bikes. $100. Can't find a link for that one yet.
Email me at outtacontrol417@gmail.com for pics or quicker reply