I have installed a set of D-Zug headlamps in my '72 911T and after the test drive found that the seal in one of them has broken and I need to replace it. We have left voice mail and emails with D-Zugs and haven't heard anything from them (perhaps they are on summer vacation?) Is there anyone in their area, Wilmington, NC, who might have any info on where they are at? Plz PM me with any info you might have. TIA.