Bob,  Here's the bill of sale we didn't use on the last deal.
I don't know how  much good it will do you, but at least it gives you some tax language.
As I  mentioned, the last deal was supposed to be a "wire me money, I'll sell you  stuff" deal, but it didn't  happen.
I'd like to see the installment sale form once it gets fixed up, if possible.
Kay

Equipment bill of sale