It's so nice that you are making a special Hanukkah card. I think that is so great!
Truthfully, "Shalom" is kind of odd for the inside of a Hanukkah card. Do you need to stamp something on the inside of the card? Or can you just write a message? Something like "Happy Holidays from our family to yours" is fine.
If you want something more "Hanukkah-y" I have the old Jewish Greetings set from Stampin' Up that says "May each candle you light bring warmth to your heart and home." I can stamp it on something and send it to you if you want.
Check out this thread for more ideas:
Forums at Splitcoaststampers
Yapha