I made a skin for the great free audio players XMMS and BMP (BMP is discontinued, and BMPx is the successor. The skin does not work for BMPx, but the old BMP is ported to Audacious) for Linux.
I’m assuming this works as a classic WinAmp skin too, as WA’s skins can be used by BMP and XMMS.
You can download the skin here. Unpack to ~/.xmms/Skins, or consult your system support.