We do a secret santa. We have a Christmas party and all contribute one gift, $10 value. (Simple things: toys, craft materials, books, puzzles... for example.) There are about 12-15 of us (can't remember off the top of my head!), so getting something for everyone would be out of the question for me.
We also do a similar thing in January for their birthdays - the original crowd were all born within 5 months of each other, so we have a joint birthday party in Jan once Christmas celebrations are over.
If I were you, I'd suggest the secret santa - probably there's others in the group wondering the same thing as you!