TinyGuards Trading via Amazon offers its TinyGuards Adjustable Shredded Memory Foam Queen Pillow for $36.99. Coupon code "48MXPQN2" cuts it to $21.82. With free shipping, that's $15 off and the lowest price we could find. They feature double zippers that let you take out about 20% of the memory foam.

It's also available in king for $23.59 with free shipping via the same coupon. That's $16 off and the lowest price we could find.