Looking for local source for a cable

[Tad G]

I'm looking for a local source for an optical audio "cable."  It's my fault, I moved my media computer to be near the amp in prep for Christmas music playing and didn't pay attention to the cable I need.  I need the fiber with the smaller tip.  Or just an adapter (I have fiber) as shown in the photo:
http://www.qvs.com/prodimages/FCTK-03K_LR.jpg

I've checked Circuit City, Radio Shack and Meyer Emco.  Does anyone have a lead on where I can buy or borrow one in the NoVA area?  

Thanks,
Tad