Yes, done this and it's not that complicated. So you pull the Shopify order payload and then grab the data, and post to / update Netsuite. It seems really simple, so I might be misunderstanding? If you're current integration does not support it, you could write a simple sidecar script to do it, but that is kind of overly chatty, so don't let any of your friends see that. If you want to DM me, I'll help ya, or just detail more here exactly what you want to do and I'll try to answer.