RE: Front Lower Control Arm Bushing Trouble?
If i were you I would replace both lower control arms. 50resto.com has an up grade you can put on for $159 for both LCA's Or if you want to have the bushing only I'm sure all the sponsors off this site sell bushings.
The following is taken from there site
This kit enables owners of 1994-04 Mustangs to upgrade to 2003 Cobra Mustang control arms. The kit features (2) front lower control arm assemblies with 50% stiffer front bushings and low friction ball joints. This control arm has a redesigned stamping to improve the turning circle approximately 10% on 1994-98 Mustangs.