You can mail order it. I just received them before I went to the dealer to get them as well. So I have an extra set as spare in the trunk.
Here are the part numbers:
Part #: 403-070-00-55
Product: INJECTOR END PLUG
You can re-use the plug. Just insert the old one into a new hose.
Part #: 615-476-03-26
Product: DIESEL FUEL HOSE
Do not hold me onto this one, I think the inside diameter is 4 mm.