gorilla grip heavy duty couch cushion support board to fix sagging sofas, 21.5 x 78 oversized sofa, thick plywood boards add strong seat supports, stay in place replacement stuffing under couches grey is up for auction in Home & Kitchen. The current bid is $1.00, 97% below the $39.99 MSRP, in Good Condition. Bid on this item at our Elizabethtown - Peterson Drive location before the auction closes.