he got back to me by the end of the day - nice prompt reply, rare-to-unheard-of in the mustang aftermarket!
somehow the order shows on my end as completed with PayPal but he didn't get anything, I'm sure it will get resolved. I was just being impatient and expecting the usual trouble in getting touch by email with the supplier that I've had in the past and wanted some reassurance that he was still around.