New seat belts for 1973 Duster?

[timk225]

My 1973 Duster could use new seat belts, black in color, for the front seat. I don't feel good relying on 51 year old belts. And it'd be nice if the drivers side seat belt was about 6 inches longer than stock. Either I got bigger in the last 20 years, or the seat belts shrink over time. Can't decide which it is.

Whats a good place to get them? I'm sure Year One has them, but just checking for alternate sources, I'd have to figure out how to install them in the seat belt retractor mechanism.

 

[Professor Fate]

Just have your existing belts rewebbed.
Many places, such as Seat Belt Planet, Seat Belts Plus, Andover and others offer this service.
That way, you know all the bracketry will fit, the hardware still appears as it should, and you can specify any changes to the length. Just be careful how much you add, as the retractors will only accept a given amount of webbing without binding- you may have to consider lap extensions, which are also offered by many of the same suppliers.
Installing them in the retractors is done when they are rewebbed, as the folds at the end have to be sewn in after the webbing is installed in the retractor.