You might try these guys: www.approvedaudioservice.com
Here's from their website:
>>Please note: We have a few upgrade kits available for the Alpha and the Icon Mk II. These are the highly sought after power boss upgrades, and they won't last long. Please contact us for price and availability. These kits are available only for installation by us, they are not for sale outright.<<
Here's from their website:
>>Please note: We have a few upgrade kits available for the Alpha and the Icon Mk II. These are the highly sought after power boss upgrades, and they won't last long. Please contact us for price and availability. These kits are available only for installation by us, they are not for sale outright.<<