I grabbed 4 FIR 2x4 studs from the shed. Lowes around here has some nice fir 2x4's.
I cut 8 pieces 38" long
I face jointed and edge jointed, table saw parallel.
Then I glued them up.
Tonight I used a 1-1/4 bit and faced the panel flat.
It is now a 25 x 38 x 1-3/8 fir panel.
Cost so far = about $10
Gonna make something cool.
Well at least "I" think it's cool