Hey Dan,
First off, welcome to the forums!!

Glad to have you!!
My first question is, are you referring to the trailing arms, or the lateral control rods? The trailing arms go from front to back, while the later control rods, of which there are 2, go from the outside in?
Both trailing arm bushings are replaceable, there is one on either end. As for the lateral control rods, only the inner bushing can be replaced, the outer one (those closest to the wheel) have a metalic inner collar which has a ball joint of sorts in the center, so it isn't replaceable. Hope it answers your question
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1995 Toyota Camry V6 LE-6M1 250K Miles, Fun Car
1997 Acura RL-Gone
2007 Acura RL SH-AWD, Technology Package, Opulent Blue Pearl- Fun Car/Daily Driver