I just bought a set from the Camping World store in Byron, GA for less than $50 on sale. This set fits a F53 with 19.5 tires. I could not find them on their website but I called them and they had a lot of them. The regular price was about $95. I am having them installed today. Call or go to the nearest CW and see what they have in stock. The part numbers are DL3FC valve stem, CW's number 84731 that fit my 2011 F53. I hope that you get some. They also had kits to fit other chassis on sale.