Why would that be wrong? Think about the client. What matters most to him? What is valuable to him? If he doesn't mind that someone else might be using that des

Why would that be wrong? Think about the client. What matters most to him? What is valuable to him? If he doesn't mind that someone else might be using that design (someone in his industry is extremely unlikely), I would absolutely do that. In fact I've done it already and it worked very well. Most clients want a good, solid design. They don't care where it comes from. I didn't have to lie to him, I told him I picked it off the Internet, and of course there were some modifications to do.