@Dlefler
You’re welcome.
As far as old vehicles go, I’d say squares are one of the best for parts availability for just about everything. So much crossover between the years and even other GM vehicles and the better part of 20 years of production run for that model doesn’t hurt either.
Really the only parts that something isn’t a available to buy either OEM or (mostly) aftermarket is the actual frame itself. That and structural cab pieces aside from the floor and related components.
But there’s enough junkers around for those parts, just more of an Easter egg hunt …