Anyone ever swap out a seatbelt?

[Hooty-Hoo]

Hey folks. Bought a 2004 Silverado for my teen son and the passenger seatbelt was cut off. As many of you probably know, the retractor assembly is in the seat. I looked for videos of how to replace and the best I could find was one on replacing the seat covers. Looks like a huge hassle but I thought I'd ask the experts here if it's worth the effort or should I just look for a replacement seat from parted out trucks? I'd appreciate any wisdom you could share.