First off dont try an paint them yourself unless you know a good car paint sprayer cos other wise they will turn out looking crap TBH, and the time it takes to prepair them for painting and actully doing the job and the price its not worth it
Second the best thing is go on ebay the are plenty of black or even carbon style grilles on ther for sale for about 35/40 UK pounds ( I dont know what that is in US dollars) or even some of the BMW specialist do them, these type of grilles are readerly avalable and have been for a very long time, I think even BMW main dealers have started doing them but they will charge mega bucks for theres and I bet they aint no different than the ones on ebay, so look on the ebay, if I see any I will post a link on here but some will be in UK pounds though
Martin
here as promised links
http://www.motormec.co.uk/grille.html http://www.genkituning.com/Exterior-...ills-s/157.htm http://www.eurosportdesign.com/c-8-bmw-exterior.aspx http://www.thefind.com/cars/info-bmw-grill I found more on ebay
http://www.ebay.co.uk/sch/i.html?_nk...ts_SM&Make=BMW http://www.ebay.co.uk/sch/i.html?_nk...ts_SM&Make=BMW