These chargers are expensive, usually around $70 for a Belkin or Samsung. 

If anyone has a one in used condition willing to sell, please let me know.

Alternatively does anyone have experience/opinions with off-market branded adaptors such as this:

https://www.trademe.co.nz/mobile-phones/accessories/chargers/other/listing-2967684824.htm?rsqid=92f769f2e3cc476a8958d191740f5f17-008

Sorry for the proliferation of WTB requests.