Looks like 4 slices of heavy duty fuel injection fuel line can accommodate this unless you want 53112-90300 on the bag. I also save left over parts from loads of other stuff and the black spacers used for flat screen TV mounts work great. Another on-demand item is the toilet tank feed line that is slightly flexible gray plastic line and runs from the shut-off valve on the lower wall to underneath the toilet or sink.
This is one of the few parts I don’t mind improvising on
This is one of the few parts I don’t mind improvising on