Can you get good street tires in that size anymore? I know some race tires are available, but not sure about street stuff.
OP, these, or similar, wheels can be commonly found when searching for Multi-X, 780 Bertone, MSW, or mesh wheels. There are various brands but the 780 Multi-X wheels are 15x7 and a great wheel. They?re ET20 like the stock 240 stuff. 240 turbo wheels are 15x6, ET20. A 225 wide tire is going to be relatively squishy and indirect vs the same brand/model tire in a 205/55-15 or 205/60-15(closest to stock diameter).
I?ll say it again. The options are limitless. You need to find a wheel you want and then we can discuss feasibility. If you like performance and the best handling, you will want a 7.5 or 8? wheel. The wider than 7? wheels also will permit you to more closely achieve the flush look you want(but you won?t actually get it, it?s just better).