What tea can I used other than Lapsang Souchong (I have other kinds but running out of this one *sigh*)?

Thank you all for the helpful information!

Lapsang Souchong has such a smoky flavor profile. I think that no matter what you should substitute a very strong, full-flavored black tea, but you won't get the same smokiness as you would with the Lapsang Souchong. Good luck!

If you have Earl Grey, it works well too. It will be a different flavor profile, but in a good kind of way.