Seat bun for Bench seats?

[jos51700]

I'm looking for a seat foam bun for my '72 Dart with a bench seat, and it's looking like the interior manufacturers don't offer this. Am I looking for something incorrectly (it may be an E-body part or something) or is this typically not offered? I don't know why I'm not seeing it. Bucket seat buns are easily found.

 

[Rick@Laysons]

Bench seats did not use a foam bun. They were filled with cotton batting material.

Having said that....it is possible to fabricate a foam bun using flat-stock foam of different thicknesses that would be layered and trimmed to size.