Mono eyes should work fine. They are not very heavy. "Christmas decoration plastic beads" isn't very specific, and might be hard to find the exact same material that was used in that recipe. I'm in the same situation. I'll probably give the mono eyes a try.
Another thing to consider is...a Texas-Rigged plastic worm commongly uses a conical-shaped "worm sinker"...and so is often fished on/near the bottom. So, heavier eyes, like bead-chain, could still be very effective, it would just give the pattern a different action.
David Merical
St. Louis, MO