I recently bought some new tips of eBay since I hated the look of the chrome BMW ones and they looked too small. I wanted something that looked like the performance exhaust tips without spending $800+ on a performance exhaust. After spending hours I finally found the perfect tips. They only cost me $50 for the tips and $20 for cutting off 3.5" of each tip to make the new ones fit. I attached some pictures. You can see the clips that hold the tips in the back but they don't bother me that much and you can barely see them.
Here's the link for the tips if anyone ones to get them:
http://m.ebay.com/itm/BMW-Oversized-...%257Ciid%253A2