A thread on DIYAudio was concerned with creating an open source PCB layout for the LM3886 amplifier. Although initiated and largely designed by user 00940, there has been some input from others, including advice from Tom Christiansen of Neurochrome, resulting in this implementation. Gerber files, the set of files necessary for a PCB lab to manufacture your project are freely available for use and modification from the link below.
Click here to download a sample Bill of Materials
Updated 14/08/2019: The BOM now includes the missing SMD resistor and placement details for components.