My best advice, get blue foglight blubs from an accessory shop or ricer shop and try them out. Honestly though, my HIDs made everything look like piss. I tried blubs that claimed to be 8K HID equivilent which was BS.
I wasted my money and the best advice I can give anyone is... you ain't going to match it that great and if you want it perfect, get the same HID rating for your fogs. Thats the only right way IMO. For the money I wasted on getting wannabe HID blubs I could of damn near bought the HID fogs in the first place. HID kits are cheap nowadays, you can get cheap deals on Ebay if you want to save money. Personally, I bought all my HID stuff from WBS.