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I've never replaced mine, but if I'm correct, they are 9006's. On other cars, I've had good luck with Phillips and Sylvania, but not GE. Now, Sylvania settled a class action, one would think they've fixed whatever issues they may have had.
You could order them here, lifetime warranty on everything they sell. I have these in my Nissan, no issues (even though the site is for Euro cars, a bulb is a bulb). I have tested them on their lifetime guarantee on other items, it's legit. So even if your car has an electrical issue and the bulb goes, they will replace. You do have to send the old back at your cost (usps is cheap)....good luck.
I personally use LED's for my foglights in both of LS' and my SC. You can order some good ones on eBay for $25. I had a blue set from Superbright LED's that still works after five years and an expensive set from V-LED's that worked for four years until one blew out. The V-LED set was one of the early high power LED lights. They are built much better now.
Depending on how quickly they are burning out you may need to look at doing more than just replacing bulbs. Clean the sockets of all corrosion and water with electrical component cleaner. Tighten the contacts if needed and use a bulb grease to ensure the contacts stay clean and minimize resistance. After it is all dried out replace a gasket if needed to keep water out. Often people just put the wrong bulbs in a housing even though it will fit. Using the wrong bulb (higher wattage) can cause it to burn out faster and damage the housing and lens. Check that you are using the correct bulb and don't just go off of what is already in there as it could already be the wrong bulb.
Most important for halogen/quartz bulbs is that there is no oil or grease on the bulb (fingerprints) or they just won't last. The quartz glass gets so hot that even a finger print on it causes enough of a temperature gradient to make the bulb fail prematurely.