2010 Cadillac CTS healight bulb replacement
 

Hello Guys I need help with my headlight bulb on my 2010 CTS performance sedan. Recently started noticing my low/high beam bulb going purple and is starting to give out. I contacted the dealer regarding issue and was give a part number ACDELCO 19352020
the bulb is about 100$+ which I think is a rip off. Does anyone know if I can replace the bulb with a H11 bulb? or any alternative? paying 100$ for a bulb seems ridiculous.
I was looking at this one Does anyone know any cheap alternatives that will fit? thank you guys!