For Samsung HTC Android Mobile Cell Phone Cable Adapter EU Plug Wall Charger http://www.ebay.com/itm/For-Samsung-HTC-Android-Mobile-Cell-Phone-Cable-Adapter-EU-Plug-Wall-Charger-/272169772021?var=&hash=item3f5e9523f5:m:m259LLRURB1yLsjAWDGw0qg
Does it needs to be original? Most of the chargers are micro-usb (Universal Serial Port), so any charger with this same plug might suits you. There are many, many sites out there that has different pros. Take a look at aliexpress if you want the lowest prices: http://bit.ly/2aZPhEX
Or maybe be more secure buying at Amazon: http://amzn.to/2aUWAMn
But if you really want to buy an original charger, be prepared to pay higher prices!
You can buy here https://www.amazon.com/gp/aw/d/B00D7MOHDO/ref=mp_s_a_1_1?ie=UTF8&qid=1470434797&sr=8-1&pi=SY200_QL40&keywords=cargador+samsung+original&dpPl=1&dpID=31vspRFCgFL&ref=plSrch
Not sure about your surroundings, but any micro usb adapter will do. Important: pay attention to output ratings anythin same or greater than 1 .0A (which is the same as 1000 mA), I can buy, in example in few shops within 100 meters around an adapter rated as 2100 mA for around 7-8 bucks
i Found it here : http://www.overstock.com/Electronics/Insten-Micro-USB-Travel-Charger-for-Motorola-Nexus-6-Samsung-Galaxy-S6-Edge-HTC-One-M9/5623893/product.html?refccid=CX52QE4TA66YRKCKJJ52IYWLXY&searchidx=36
Visit this page: http://es.aliexpress.com/store/product/Ugreen-QC-2-0-5V2A-9V2A-12V1-5A-USB-Fast-Wall-Charger-with-Qualcomm-Certificated-Quick/301635_32669473020.html?spm=2114.04010208.3.2.4fejXZ&ws_ab_test=searchweb201556_10,searchweb201602_2_10057_10056_10055_10037_10049_10033_10059_10032_10058_10017_10060_10061_10062_10064,searchweb201603_4&btsid=271eb664-f60d-4475-bbcd-9fcdb99d26e5
hello friend, here you have it for only 2,22 e. economic costs, greetings hope will be useful. http://www.ebay.it/itm/ETA-U90EW-Cargador-adaptador-USB-original-blanco-cable-Samsung-Galaxy-Note-4-/331859200879?hash=item4d44598b6f