It kills me to pay for that stuff, so I feel your pain! Unfortunately, a bridal shower isn't really a place that it seems appropriate to use the comics or freezer paper.
On the other hand, procrastination can be frugality's friend too. When you get tempted to buy something, often you'll find it eventually secondhand, or you can wait for a great sale. Or even better, you'll decide you don't even need it or want it anymore after waiting awhile.