I immediately thought about the hardware they use on school and RTD buses & trains for the hand rails. No idea who makes it, though if you spoke Chinese it might help to call them.
'91 Pickup - Imelda
'08 Tacoma TRD
'09 Kawasaki KLR650
'12 Gunnar Rockhound 29
"To live is to suffer, to survive is to find some meaning in the suffering." -- Friedrich Nietzsche