Certainly that is possible, Fred. You need to open an account with two lines, then port both numbers in. Couldn't be simpler :) You need to visit a kiosk with two pieces of ID and after a credit check, they'll be able to set it up for you.
Make sure you guys don't cancel with your Bell account because it needs to be open in order to port the numbers to Koodo. Once you port your number, your Bell account will immediately cancel itself and you should receive a final bill from them.