Logos converted to single colour with transparent background.

I need a 15 brand logos (such as Tripadvisor, Expedia, Facebook etc..) converted into a single colour (white) .PNG with a transparent background. Logos will be displayed on a website (see attached example) and must scale down to 50px in height but still look crisp.

All logos are big well-known website brands so it will be up to you to source the original logo to convert.

Logos required are:

Facebook
Tripadvisor
Yelp
Booking.com
Expedia
AirBnB
Agoada
Hotels.com
HolidayTruths
InsiderPages
Zomato
Dexknows
TrustPilot
Orbitz
Lastminute.com