Update: Finished the conversion to the Red Belts yesterday. Bought 8 yards of Flame Red 2" webbing from seatbelt pros.com ; then took the webbing to local upholstery shop. Took 2 hours of shop time to complete the job. My total cost was $50 for the webbing and $120 in labor, about 1/2 the price of the new belts in the retractors. Had I just taken the belts/retractors to upholsterer, would have cost $70
Will post a pic when the sun comes out...