Go to (
cut & paste link below into browser) the Sylvania replacement bulb guide:
sylvania.com/ConsumerProducts/AutomotiveLighting/LampReplacementGuide
Select make/model/year and get bulb size. Then just do a google search for "silvervision [bulb size/#]" and you'll find your option. There aren't a whole lot of options so and don't forget to check ebay as that's where I bought mine.
Good luck