If you can not get any HD Formula +, Spectro Primary, or Red Line V-Twin Primary Case Oil, then any 85wt. chaincase lube will do in a pinch. But just check for a lube oil fit-for-purpose in a wet clutch application. If it is just a case of having to wait for the HD place to open next business day, then check with Momma and see what else is on the Honey Do list. If you just HAVE to go riding, then call some of your buddies and see if anyone has a bottle of HD Formula + you can beg, borrow, or buy from them.
TQ