Studs can be purchased almost anywhere but you can check Turner Motorsports, BavarianX, EAS, LTBMW, Wheeldude, VAC, etc.
Lugs... There's an endless choice that you can go with. If you want simple lugs for cheap, get some BLOX lugnuts.
http://www.bloxracing.com/bloxshop/i...product_id=287