Identify Varistor TVR 20471
This is a link to a datasheet for the TVR  product line that shows your part on page 16.  It is from THINKING ELECTRONIC INDUSTRIAL Co. LTD in Taiwan.  The datasheet lists the part characteristics, so you should be able to find an equivalent, if you can't find the actual part.  They are available on AliExpress.



Here are some potential subs found using the parametric search on Digikey: