WANTED: Leg extension on my seats

[jpapa]

After a long trip in the X5 this weekend I couldn't walk after getting out of the car because my legs hurt so bad. It seems the bottom part of the seat is not long enough to support my long legs. My M3 has the leg extensions on the front seats but unfortunately the X5 doesn't. I didn't think I'd need the sport seats in the X5 but now I'm regretting it. Does anyone know what it would take (cost/time) to replace my seats with sport seats? I believe I just have the standard seats, not comfort. Or does anyone know if there is anything on the market that extends the bottom part of the seat?