I tried to first order the bushings only, took them to an indy shop, and they literally quit in the middle of the project stating that it was too hard and taking too long.
My LR dealer refused to replace bushings only, and instead advised whole control arms be replaced. Atlantic British has the control arms in stock cheaper than the dealer, so call them and get a quote. then talk to the LR dealer parts manager and they will match the atlantic british price.
Suck it up and replace both sides, because chances are the other side will go soon and you will have to pay another $200 for alignment.
Once my LCA's were replaced, I felt like I was in a BMW again and it was worth the cash.