The “Throwing my hat…” thread is huge, if you don’t feel like sorting through 500+ posts I think this post specifically might help (post 292): Throwing my hat in the sled modification ring - #292 by pillageTHENburn
It should at least get you started in the right direction.
The design is pretty simple so you can certainly make the linkages yourself! Or, if you don’t want to deal with making accurate parts I make laser cut kits too that come with all the needed hardware (link).
I especially love seeing other people’s version so if you do make one please post pictures!!