adding loft rail to 3950?

Anyone have a solution for adding a loft rail to a 3950?
Looking to add something to ensure my 8 year old doesn't fall off the loft when sleeping.

thx

did more searching found these

//heartlandowners.org/showthread.php/25592-Safety-rail
//heartlandowners.org/showthread.php/6796-What-are-you-guys-doing-for-a-bunk-bed-rail

What I would like to do is build in a solution much like the cyclone 3800 has (attach the rail to the wall and ceiling running perpendicular to the 5er.
Thoughts?