Most of the grilles sold by reputable online retailers are of good quality (read: not ebay). I've seen grilles at all sorts of sites like truckperformance.com, ultimatetruckandvan.com, and many other related car parts sites. Most install easily without being very invasive. However, some require cutting out the stock grille parts (I think Steel Horse might be the only one like that, and it might not even be applicable to your 99). Just do some hunting. Recommendation, b4 you buy something, check out the manufacturers' website for more info on the products than you get from the retailer sites.
Good luck!