The two most popular mockumentary series, The Office and Parks and Rec, do a decent job with set selection, but in the episodes that feature extended outdoor scenes, trying to substitute LA for Rustbet/Midwest is difficult.
I think about like the Rabies Run episode of the office:
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As they're filming the scenes throughout residential neighbourhoods, the bungalows, front fences, stucco construction, etc. make it painfully obvious that you're not in Scranton, PA. Pretty difficult to find this kind of vernacular in LA:
I think Parks and Rec had it slightly easier, since small town Indiana actually would feature more bungalows, but you'd still expect the houses to be more spaced out and probably wouldn't see many jailbar windows.