what about as far as upgrades go? headers,intakes, aftercoolers etcAftermarket? I think, if anything, it's shrunk.
We have a few custom accessories today that we didn't have 5 years ago, but parts wise, as an example, early model SC crank sensors are no longer available new.
We've lost one SC-centric specific supplier, but I think in general the same items that were available 5 years ago are still available now.
Try https://www.supercoupeperformance.com & https://magnumpowers.com
Which supplier was lost?
What kind of parts?