Hancock Fabrics sent me a customer appreciation notice. It says foam will be on sale for 30% off on Mar 30 - Apr 2.
Tried to do a search to send people to this notice but I could not find the notice in any of their sales brochures.
This is where I got my 3 inch high density foam that I used under the memory foam on the front bunk. Mine is only 24 inches wide, which beat the 18 inch wide that came with the trailer.
If you have a Hancock Store and need foam call them on the 30th and ask if it is on sale, and then go take a look. Maybe my notice was a local thing. Did not see that coupon was required.