AC Adapter Options for 2014 Razer Blade

I'm looking for a spare AC Adapter for my 2014 Razer Blade. I know it needs 150W but I don't know what else to look for. I don't want to pay $130 for the official Razer one, but I don't really want to fry my system either. I've seen Dell branded 150w AC adapters on eBay for as little as $25 but I want to make sure I get the right specs. I don't care too much about how bulky it is because it'll just be on my desk at work all the time. My laptop is plugged in all day at work though, so I want to make sure it's good quality. Someone in the owner's lounge posted a link to an Asus branded adapter that will work on eBay, but the seller inexplicably raised the price from about $40 to around $140. Any suggestions?

 

I have one of these giants: http://www.amazon.com/Original-Precision-Alienware-Workstation-DA210PE1-00/dp/B00CLYZTF4/ with one of these adapters: Amazon.com: Pwr+® Adapter 7.4x5.0mm to 5.5x2.5mm Tip Connector Converter; from Hp Pavilion, Envy, Elitebook, Probook, Compaq Presario, Dell Latitude, Inspiron, XPS, Studio, Vostro, Precision, Alienware to Asus, Vivobook, Toshiba Satellite, Portege, T. Obviously that is overkill, but it's what I had lying around. Anything with at least [email protected], 7.9A@19V or [email protected] should be fine as long as it's not a cheap knockoff that overstates its capabilities.

 

So would this work?
150W Genuine AC Adapter Charger Dell Precision M90 M6300 M6400 ADP 150RB B | eBay

 

It's used, but yeah, as long as it's in working order that would work fine. You will need a plug adapter like the one I linked above since the output plug is 7.4x5mm instead of 5.5x2.5mm.