Ahhhh, a man after my own heart! It took me a while to get all my Evo Truck Alloys in black!
The only place I found anywhere that had any GPM Alloys for the Truck in black was PDQ Mods on eBay.
PDQ Mods Link
Get a list of all the parts you want, then email him and ask for a bulk discount. Feel free to throw my name in there as a referral (my account name on ebay is Namuna38), that might help.
Good luck and make sure you share some pics!!!