Talk to company that will handle printing the ads. They might require certain formats or will recommend the programs they use.There are some general publishing software that works well. You will need photos of the items on sale, but once you have them it will go rather quickly.
Oh wow, sorry about my first answer...just got what you were asking. Unfortunately I do not know of any software that is available, but if you have pictures of what is on sale you can probably find something with simple drag and drops and work from that.
