Oh my. I wish you good luck in finding them a home!
If you haven't already it's a good idea to make a posting on
Guinea Lynx,
Guinea Pig Home,
Pigloo, and
Petfinder Local Classifieds.
If you absolutely run out of time, please try to get them to a rescue. You may even want to contact them to see if they'd be willing to help you list them. I know
Critter Corral is based in Illinois.
I wish you the best of luck finding them both a home.