Ruh roh
I have some on the shelf but if I can't replace it it's not going to be available.
I last stocked up at BJ's off the shelf in Henrietta for a totally normal price in late spring. Maybe holler at Arie and see if Hahn has stock if it's really limited for some reason?
Pretty much any decent diesel oil is fine, these don't have the fragile camshafts of the later TDIs that need the super fancy oil.
I interchange Delvac 1300, Rotella T, or any name brand that meets the somethingsomething 5 spec