Propride also sells an extension kit consisting of 2 safety chain extensions and 2 couplings, an 18" 7way plug cord extension, and a brake away cable extension. Are those included with your hitch? Did you find an invoice or complete parts list you could use as an invoice to me? If I knew how you will pack them, including package weight, length, width, girth; I could get some shipping quotes. I would prefer to pay with PayPal. If you don't have an account, it takes only minutes to set one up. Thanks.