S4/RS4 Underbody/Undercarriage cover kits

[AnotherMonday]

Managed to completely mangle my underbody cover driving over ice during the cold snap (the south does not see snow, lol) and looking to grab a new set.

I only see parts of the set on some sites specifically for the S4 (ECS and the like) but also full sets for the RS4 on others. Are these interchangeable to avoid missing parts or does anyone have a set they’re willing to part with?

[08 classic]

They all share the same subframe, so it fits any generation B7.

[AnotherMonday]

They all share the same subframe, so it fits any generation B7.

Thanks a ton, bro.

[Rilla]

Depending on the part you are talking about there could definitely be differences between the models