You could use "Conduit Elbows" or the "Flow Bend Clips" made by John-Guest to help route the tubing without kinking it.
OR ...
Try to see if their FLOW BEND CONNECTOR Superseal x Speedfit elbows work.
They come in many sizes too ...
http://www.johnguest.com/part_spec.asp?s=SI42_D1
Peace!
Stev