I know one - cost!
Cost? What cost?
You mean a cost of bureaucrats who should be doing their job and not sitting on their arses finding excuses of not charting approaches. If there is already an NDB approach charting a simple overlay approach over it is very easy, doesn't even require getting up from the desk.
your way, it appears you'll have to fly all the way up to SIY(Siskiyou county) to find one.
westhawk - I tip my hat to you for this find!