It should not make a difference where you get them. Classic and Ames carry very similar if not the exact same items.

It is my understanding they are actually 2 different pieces anyway (floor and 'foot rest/ firewall extension'). Not sure about the turn down portion. The quarter floor sections they sell do have them so I would assume the full length halves do too.

I would call Ames and discuss with them as they are MUCH closer to you than Classic is. They have very knowledgeable sales reps and probably will also save a ton on shipping. That's where Classic will usually get you, unless you place a very large order.