I looked into the same thing after a few longer touring rides.
I think the consensus was that some fabricated foot rests or crash bars are just about you're only options, without spending some real money.
I wouldn't be that hard to have a bike shop extend the shift lever and forward controls, but you'll have to ask around for local quotes.
Even an "S" shaped foot rest attachment would be nice, to extent the rests forward, but I'm not a machinist so I can't experiment with them
Like I said, it shouldn't be too terribly hard, but you'll have to use your imagination, as nothing is currently available in the aftermarket world.
EDIT: This might also help.
Gadzooks Mike did a write-up on installing floorboards a long time ago.
Floorboards -
viewtopic.php?f=9&t=583&hilit=floorboards