* Amazon: Search for "1999 Chrysler Sebring dash knobs." They often have a wide variety of options from different sellers.
* eBay: Similar to Amazon, eBay has a large selection of used and new parts, often at competitive prices. Again, be specific with your search terms.
* RockAuto.com: This is a popular online auto parts retailer that offers a comprehensive catalog. They usually have diagrams to help you identify the specific knob you need.
* AutoZone, Advance Auto Parts, O'Reilly Auto Parts: These are brick-and-mortar auto parts stores with online presences. You can check their websites or visit a store near you.
* Local junkyards: This is the most budget-friendly option, but requires more legwork. Call around to local junkyards and see if they have a 1999 Chrysler Sebring available for parts.
Important Note: When ordering online, make sure to double-check the compatibility to ensure the knobs are the right fit for your specific Sebring model. A photo of the knob you need would be highly beneficial when searching. The trim level (LX, LXi, etc.) can also affect the exact parts you need.