@un_id
whats wrong with the coiled cable?
if you really like a long messy uncoil cable id recommend you go down to jln pasar, buy 2.5mm & 3.5mm plugs and some cable from the same shop and ask them politely to make you the finished thingy, they gladly do it for mininum charge (rm5++)----probably cheaper than what most diy gurus will charge you,,,,,

@siles1991
id recommend you use 2 switches in your design

1- switch 1 for on-off ---to cut signal when you switch source
2- switch 2 for source A, source B

read rs components /farnell/ element14 catalogs for ideas of choice of swtiches in the market

there must be a premium switch that cut off signal when the switch triggered so with these you only need 1switch but im to sleepy to do research right now,,,,