14 R1, urgently looking for new AC Adapter

Recently the AC adaptor for my Alienware 14 has broken and I can't use my laptop unless it's at a certain angle (the internal battery doesn't retain any charge either). I also keep getting battery warnings upon booting about needing to connect an 150W Dell charger. I've been looking endlessly for a charger matching mine and found absolutely nothing. Every "150W Dell charger" comes from a fake store with bootleg chargers from China and it's impossible to find anything else. I don't want to purchase a charger that can potentially be hazardous to my laptop and cause an even bigger problem. Are there any available stores that sell an Alienware 14 adaptor and ship to the U.K.?  I've almost given up searching and I hope someone can help me. Thanks in advance.