Edited to add: Yes, I'm aware of the typo in the subject line, dammit, saw it after I hit "Post".
I am in Parnell, Auckland, and am using a Lenovo YOGA 910 that uses the original wall charger with USB C connector that plugs into the laptop.
Like you, I only need another charger as a spare only.
Outputs 20V/12v/5v model ULL-100305-EA. 45Watt.
If your supply uses USB C it may be compatible. If so, I may be interested, however, as it is a spare only and hopefully will never be needed, I would not want to spend very much for it.
If you think your charger is compatible, let me know where you are located, and how much you are wanting for it.