New upper control arms? Which ones?

Have heard both that it doesn't matter which ones to get and to only get the US made versions and stay away from the imports.
I notice that most companies only have one uca and don't mention whether its US made or an import.

Whats the opinion here?

Where are good places to get these?
 
I always get my suspension pieces, UCAs included, from American Pony....the US counterpart of Canadian Mustang. They sell the 4 rivet arms that are still manufactured by one of the OEM suppliers that made them for Ford almost 40 years ago.