There are other people who specialize in smog components.
Greenhoe's Corvette & Bill Hodel are well known people who do this.
They both have adds in Hemmings all the time.
I think they all charge around $1500 for complete restored systems. I might be on the low side.
I think this is a case where ebay is a place to save a few bucks & although the system wouldn't be as "new" as a restored system it all depends on what you're looking for