I checked Walmart.com and can't seem to find any envelopes! Do you have a Staples near by? If so, they have padded envelopes for $0.50: Staples

1999 Contour SVT #1966/2760, Silver Frost/Midnight Blue Koni Kit, Mille Miglia MM-S rims, B&M shifter, Stazi mesh, SFCs, optimized Y-pipe & TB, SS break lines, K&N drop-in, Infinity Kappa speakers, MTX amp/sub