Sourcing your own panels is easy! You can look up a local establishment that sells wood and give them a call with the dimensions you are looking for — if you would like to make panels that are the exact size as the panels we provide with the Bed Frame, you will ask for 86” long x 22” wide x 1.5” thick.Note: The 1.5" thickness is very important to be sure your panels sit properly in the Framework.You can make your panels any length or width you would like though, as long as your mattress will be fully supported by the panels (there should be no overhang). If you would like your panels to be flush with your mattress, you can determine their size based on the size of your mattress. Keep in mind that a Twin Framework includes supports to hold 2 panels, a Queen Framework includes supports to hold 3 panels, and a King Framework includes supports to hold 4 panels.Note: you can use two 0.75” pieces of wood glued together to get the 1.5” thickness. Similarly, outside of the US, you can use two 19mm pieces of wood to get a 38mm thickness. This will still work just fine :)