2010 Scion XB Prices, Reviews, and Photos - MotorTrend
Amazon.com: Harmony Audio Bundle Compatible with 2004-2015 Scion xB HA-R65 New Front Door Speaker Replacement Upgrade Package with HA-728104 Speaker Replacement Harness : Electronics
Scosche 2004-06 Scion xB Rear 6.5" to Aftermarket 5.25"/6.5" Speaker Adapter (pair) in the Mobile Audio department at Lowes.com