Here is what is still available for chassis parts from Spicer Chassis (parts fit all models - except for lower ball joints, which fit 75-up only):
Lower ball joint: 505-1031
Upper control arm bushing: 565-1024
Upper control arm bushing (+1*): 560-1046
Lower control arm bushing: 565-1025
Sway bar Link kit: 545-1013
Performance: 545-1065
Tie rod adjusting sleeve: 425-1013
Inner tie rod end: 401-1106
Outer tie rod end: 401-1109
Rear control arm bushing (at frame): 570-1003
(at axle): 560-1024
Right now, these parts are available, but many are in limited supply.
Chuck