So after about three years my Sennheiser PX100s just lost sound in the right headphones... It's due to a broken wire directly behind the connector that goes into the MP3 player or computer... So like 3cm in, after the plug, there's a split in the cover, the wire was exposed, and after like 2 years of further use it finally went kaput today.

I was thinking of cutting the wire off above where the wire is broken, and am going to just solder it to a new 1/8" connector.
Where does one get a 1/8" connector though?
I'll assume Radio Shack has them (unless I'm wrong), but anywhere else (mainly because it's kinda out of the way)?