breakout board question

Evening,

I have the need to construct a breakout board for my
parallel port and game port. are opto-couplers the best way
to go for isolating the ports , i've read elsewhere
that they are slow ? can anyone tell me what components
or ratings that i would need? i'm using geckos, so i
believe these units are already isolated.
i know there are suppliers already out there , but
i just dont have the bux

thanks
jeff