Reviving funky seatbelts... suggestions?

[SunSoaked]

As I near completion of my interior, I'm down to doing something with the seatbelts. I've had great success with recoloring everything using SEM but, I don't know how to approach the seatbelts themselves. They are tan or saddle with the usual grunge embedded in them. Is it feasable to try to restore them or just bite the bullet and buy new (LMC)? Can the fabric be dyed and made soft and flexible again? Dying them black is perfectly fine with me.