Striped has the right idea..... I tried saving money on a replica saleen wing, thing a) didn't fit stock holes, (b) was cracked and chipped beyond repair (which they made me file a claim against UPS and buy another which it clearly wasn't UPS that damaged the POS as the box was in perfect condition). After getting my money back from these fools weeks later, the part finally came off B/O from Saleen, and ya know what, their product was better, but not flawless (and twice the price!). Luckily, the tips were the part all chipped up and I was making my own out of aluminum plate.
Now Cervini's, they were a pleasure to work with! Their stuff isn't the cheapest, but the body kit spent virtually no time in the body shop being prepped! Fit like a charm. If the body shop spends 8 hours trying to fit up your kit instead of an hour or two, where exactly did you save any money?!