Frame Destination recently expanded our mounting board product offering. Top of the line Fome-Cor® products:

Acid Free foamboard (archival, but less expensive then Bainbridge Artcare Foamcore)
Self-Adhesive foambaord - both low tack which is repositionable, and more permanent high tack.
1/2 Gatorfoam in white and black core for frame-less or cases where you need something more rigid than foamcore.
Heat activated foamboard.

We can sell them in full sheets (except the Gatorboard) or cut down to any size you need.

Check it out here: