I've searched the forums and various electronic cabling stores and I cannot find any 1/8M to 1/4M cables. I'm not looking for anything expensive <$30 would be ideal and roughly 1.7m-2.0m in length would be great.
You could make your own pretty easily if you have a soldering iron.
Or just buy a 1/8m to1/8m cable and get a 1/8m to 1/4m adapter.
Not the length you were looking for but there is probably something similar in a longer length.