You may have already seen this option, but some companies offer a service to send in your existing belts and they change to the color of your choice. I’m thinking about it for my Cayman, but it’s a little more difficult when it’s your daily driver. Turnaround time seems pretty quick though and the price is hard to beat. Especially when compared to buying the replacement belts directly from Porsche. The company below appears to be the best I’ve found, but I don’t have any direct experience with them.

https://www.seatbeltplanet.com/i-304...rewebbing.html

Hope you don’t mind me posting but I’m also looking for a front set but for a 997/987 (in either red or yellow)