You shouldn't have any loss issues at those lengths, I don't think, and any one of several basic switches should work fine. Try:
http://www.crutchfield.com/S-IEDiQ8mlE2U/cgi-bin/prodview.asp?i=257JXS111&bfinfo=009nrq135u3026u El cheapo
or
http://www.inday.com/#HDTV%204x1%20Component%20Video%20Switcher
The bandwidth of component outputs is not that great-- the switcher is not that big of a deal. People tend to think it's high bandwidth digital or something, but it's already decoded, the bandwidth's not that high, and therefore the switcher or splitter can be pretty basic.
http://www.crutchfield.com/S-IEDiQ8mlE2U/cgi-bin/prodview.asp?i=257JXS111&bfinfo=009nrq135u3026u El cheapo
or
http://www.inday.com/#HDTV%204x1%20Component%20Video%20Switcher
The bandwidth of component outputs is not that great-- the switcher is not that big of a deal. People tend to think it's high bandwidth digital or something, but it's already decoded, the bandwidth's not that high, and therefore the switcher or splitter can be pretty basic.