Need New AC Adapter for Lenovo y50-Touch

jsmurray2

Estimable
Aug 16, 2015
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Hello,
I've recently lost the charger that came with my Lenovo y50-Touch. I live in the United States and the official replacement is $100 from the lenovo website. The charger:

Input 100-240v, 50-60 Hz AC
Output Voltage 20 V DC 6.75A
Power 135 W

I think the official part # is 36200609

I really don't want to have to pay $100 for a new one and am not sure if there are any good 3rd party adapters that will work, I want it to have the same specs so it doesn't hurt my battery life or anything. I use the PC for gaming while charging so I think a lower power like a cheaper 90w might hurt the performance.
Thank you