I have no idea Eric, sorry. But thanks for posting as I now won't be crafting one for myself. I think they are a brilliant idea especially as my wife (all 5 foot of her) has to virtually deploy a parachute to get out of my truck with only a 30mm lift.
My advice would be to contact the suppliers or even the manufacturer and ask the question. If you don't get much help then it's down to you to take the plunge, buy a set the right length and fabricate something to make them fit.
Thanks for posting and good luck.