I will try to make my own voices based on the melodyne tutorial. However my english pronunciation is not perfect, and only got a very poo microphone, I'll see what can I do, and will post the results.
If it will be acceptable, will change my green level hints into speeches.

And finally I will introduce my long-waited cube-replacement. My english grammar also need some polishing, so can somebody check these sentences and correct them if they have any syntax error?:
"Due to logistics problem, your companion cube is currently not available. However we prepared a temporary new partner for you. Please take care of the super intelligent super friendly portable lightened companion toilet."
(a toilet will fall from the boxdropper before the last word)
Some other phrase:
"Please keep in mind, that the companion toilet has no internal portals, so anything goes in stays in. To prevent it to became a weighted companion, please use it with moderation."
"The companion toilet cannot speak, however it can take your crap."
"The companion toiled dont give a shit. You do."
"Your faithful companion toilet was called back for immediate maintenance. Please place it to the companion transporter platform."
"Are you tired? Share yourself with the toilet"
"The companion toilet don't hate you. It only hates Aperture Bean conserves."
"Have you ever thought about what these storage cubes store?"
And yes, I know it doesnt suit the "portal" universe, but I want to make my map series a bit different and entertaining rather than serious. With other internal jokes and situations too 
But first I must solve the noise reduction/filter problem....