Hey Jim,
Don’t know if you’re on Instagram but the “yotatrader” account oftentimes has great stuff on it. Seems to be the go-to used retailer for Toyota parts on that social media platform.
EBay also always seems to have at least one stock 1st Gen sequoia roof rack available. I’d be sure to double check which year the rack is from though. I bought a stock roof rack off of eBay a while back and it just listed it as an 01-07 part. The cross bars and side rails were a match but the end caps of the side rails were just a hair longer. Luckily I only needed the cross bars.