If you have access to a saw and drill, here is a wooden version of the 100 Rekenrek for about $1 a piece. They aren't pretty but the individual ones are $16 a piece. Yikes!
This is super cool!! Use a small piece of a pipe cleaner as a needle when stringing beads. This works great so that the end of the yarn doesn't fray.
Here's my new teacher 100 Rekenrek.