Hard pass. You won’t ride it. You won’t enjoy it. Never fully at least. I’m assuming this frame builder doesn’t build frames anymore or is no longer around to do so, which is why you haven’t sprung for your own. But another will come along. Have you put feelers out here to get help looking for one? You’d be surprised what people can help you track down. But you’re looking for people to talk you into something that you clearly know is a waste of time and money, if we are being blunt and honest. 55cm for someone your size is silly.