The lower control arm and any other parts he may need should be available at a salvage yard. The only reason it would be damaged as you describe is lack of maintenance and lubrication. The ones in the salvage yards will most likely be nearly as good as "new".

1953 Chevrolet 3600
Fried Green T'mater (Vern)
In the Stovebolt Gallery
Caution: Political Statement
Man who runs in front of car gets tired, man who runs behind car gets exhausted.