I bought The following for my c-130 "Robo stuts all around":

(5) #650 straight robostruts 3/8" --4 for the mains and one for the nose---------------------------$44.95 ea. total--$224.75
(5) #654001M mountings blocks----to hold the robo struts to the ply side plate---------------------$11.50 ea. total--$ 57.50
(10) #654003M steering arm yoke-8 clamped to the mains & locked to the side ply plate.
2 for the nose strut not clamped to anything so it may steer--$ 1.65 ea. total--$ 16.50
plus their shipping and handling charges-------$ 8.00

So the total gear strut assy. cost me just over $300