It's impossible for us to get 100% of our refund back because steamboat converted some btc --> usd to cover the parts costs, exactly how much he had swapped over is anyone's guess and is why a bit of transparency would go a long way.
Wasn't the entire amount converted to USD in the cart via bitpay?
I believe they have options for receiving payments in either BTC or USD. We really have no way of knowing what option SB chose. For all we know, he may have even taken part in USD and part in BTC.