where is a good place to get a rear passinger full quarter panel? and what do you think it would cost to have it installed?

I bought a set of full rear quarters for a 70-72 hardtop and now dont need them, these are the new ones that just came out

I bought one from chevy land in Sacramento for my 67 the body shop i took it to said it was pretty good. I also got one from year one for a nova actually it was a rear quarter skin that i put on i wasn't very experienced but it was short I think they all come from the same supplier (hung suck) but i did get a patch panel once made in Canada it was good quality don't know if any one there still makes parts

thats what i want to know like opg,year one,i have never had to have a rear quarter replaced but i just bought a 68 chevelle ss numbers matching and i want to do it correct the first time. thanks for the help and if anyone has more info that would be great.