Can anyone speak to the differences between the gasser and diesel fuel lines (tank to filter) for a GMT400?

I'd believe that they are completely different, but the online pictures seem at least somewhat similar.

I'm having a hard time finding diesel lines, but gasser lines are readily available - including stainless. A few years ago I replaced the lines on the K2500 and was able to find lines easily. The lines on the Yukon are now weeping (thanks, winter road salt) and need to be replaced. Prebent lines would make for less downtime than working out my own from scratch. I don't know if the current lack of options is due to the age of the vehicle or supply chain issues.

Any idea on the gasser lines? Or resources for diesel lines?

Much appreciated!