I know many laser engrave/cut acrylic, thought you might find this PAIR of benders interesting.
I never saw them on ebay or amazon for a pair. Might be useful for other plastics as well.
I *think* the square he makes if foam board, I couldn't tell for sure.
Video (this guy must have asbestos hands):
https://www.youtube.com/watch?v=QluHdelO2yg
Notice that he applies self-adhesive teflon cloth to one bender. This is the same stuff you use on impulse sealers to prevent sticking. Not sure if it would be need for acrylic work, but just something to keep in mind if you decide to get one.
$51 USD with free shipping, but doesn't state US Plug:
aliexpress DOT com/item/Arc-Shape-Bending-Tool-Acrylic-Letter-Bender-Angle-heat-Bender-AC-110v-220v-Acrylic-luminous-letter/1721605165.html
$63 USD shipped and DOES state US Plug:
aliexpress DOT com/item/Acrylic-Letter-Bender-Angle-heat-Bender-Arc-Shape-Bending-Tool-AC-110v-220v-Acrylic-luminous-letter/1613950286.html
More search results:
aliexpress DOT com/wholesale?SearchText=Acrylic+Letter+Bender+&catId= &initiative_id=SB_20140521000357
Sample photos, note the Non-US plug:
http://www.acrylicbender.net/Acrylic...g-Details.html