Go to nearest hardware shop, ask for a piece of plywood cut to required dimensions. Its super cheap...
To attach pedals to board, you have several options... I took the easiest way out - Sticky Tape.
Get the brown packing tape and make sticky rolls of it. Attach the base/rubber feet of the pedal to the board using these. Now get some 1.5" clear tape and stick it so that it attaches to the sides of the pedal and the board on all four sides. Rinse n repeat for all the pedals...
-- My current rig
Guitar: '98 MIJ Ibanez RG520 QS w EMG 81/60
Amp: Laney LC15R Tube, Fernandes 20W SS
Pedals: MI Audio Tube Zone Overdrive, Boss OD3, CS3, MT2, HM2, DS2, CE5, DD7, TU3, Beta Aivin DD2 Delay, Dunlop Crybaby 95Q, Stranger Vol Pedal, BBE SupaCharger
Others: Yamaha RBX 374 Bass, Yamaha MM-6 Synth, M-Audio Fast Track, Shure SM-57, Heet Sound E-Bow Plus
Wanted(pm if selling): EB VPJr/Boss FV500L,Ibanez w Original/Lo-Pro Edge