will trade new 6-8-9 tooth gear for new 7 tooth

trade 6 - 8 - 9 for a 7 tooth i will pay all shipping.the track i run likes 7th tooth and they wear fast . to get a new 1 i have to buy the set of 4 {6 7 8 9} so i have a bunch of new 6 8 9 tooth gears