Amazon has the 12-Piece Samsonite Luggage Compression Bag Kit (Clear, 51714-1212) for $15 with free shipping on $35+ or with Prime. Includes:

• 2 small hand rolled pouches (11.5" x 13.5")
• 4 carry-on hand rolled pouches (13.5" x 19.5")
• 4 large hand rolled pouches (18" x 22.5")
• 2 large vacuumed sealed pouches (23.5" x 31.5")