Are there any other suppliers for parts (ballasts, lights, & harnesses) that will work with these retrofits other than theretrofitsource? The reason I ask is because I've had 3 sets of these lights, 2 had quad-xenon's and one dual xenon's. Every single set has had issues with the lights intermittently working after 3-4 months of use... I only drive approximately 8,500 miles per year, so I don't drive much... in other words, very very little use and having issues. I used dielectric grease with all my connections. The ballasts are all mounted upwards so water can't intrude into the connections. The harnesses are mounted upwards as well. I'd really like to try a different supplier if at all possible.