Here is a list of material suppliers that I've used that I can recommend.

WOOD:

• Smokey Hill Designs: https://smokeyhilldesigns.com/ 
• Laser Wood Supplies: https://laserwoodsupplies.com/
• Ocooch Hardwoods: http://ocoochhardwoods.com/

 ACRYLIC:

• Cerulean Tides: https://ceruleantides.com/
• Houston Acrylic: https://houstonacrylic.com/
• Smokey Hill Designs: https://smokeyhilldesigns.com/collections/acrylic

 SPECIALITY ACRYLIC:

• PatternPly: https://smokeyhilldesigns.com/collections/coming-soon

 BLANKS:

• https://crazylaserdad.com/