WTB / WTT Apple Laptop Charger - Magsafe 2

SRich

Long shot I'm sure, but anyone have one of these hanging around and available? - Apple 85W Magsafe 2 Power Adaptor

https://www.apple.com/uk/shop/product/MD506B/B/apple-85w-magsafe-2-power-adapter-for-macbook-pro-with-retina-display

This one for a 2015 Late MacBook Pro Retina.

Lodious

I don't have one hanging around, but I bought a similar 3rd party adapter off Amazon when I lost mine and it's been fine. 

the_jaffa

I bought a refurb one via eBay and it’s been spot on. 

https://www.ebay.co.uk/itm/254742187271

Danny1969

A genuine refurb one will generally be fine but I wouldn't recommend a third party one unless you know it's a reputable brand and built correctly. 
The one wire Magsafe system uses a micro controller chip to monitor and control the voltage and current draw. It's a sophisticated system of communication between the SMC on the board, the battery and the charger and if the circuit is damaged by a shit knock off charger then your be needing a new board as well as a proper charger. 

If you have a good genuine end (the magsafe end) then you can modify another charger as the micro controller side of things is actually in the magsafe connector it's self.