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.
I bought chrome bulbs from StealthBulbs (no affiliation). They cost more than some other options out there, but the bulbs are top quality and the service was great. They have a lifetime warranty so they will send a free replacement if one ever fails.
In my opinion, I would avoid xenonmods. Others have bought from him in the past but I had to file a PayPal claim to get my money back after he did not ship product. On the website they claim to send tracking info and ship within 24-48 hours, but I didn't have product or any email response after 11 days so I filed a claim. After 24 days and after I had filed a claim and cancelled the order, he sends bulbs then accuses me of being a thief for cancelling payment! ANY option is better than xenonmods.
Bulbs needed:
7506 front turn bulbs
2825/194 side marker bulbs
7507 rear turn bulbs (if you have the clear/red tail lights)