end holders for the razors in a razor box?

I've got a nice little wooden box that I keep eight razors in. At the moment, I just wrap each razor in cloth and then line them up (standing vertically). I'd love to be able to see them in the box, but need to convert it to a razor box. One way would just be to cut seven separators and glue them in. But I've seen little notched blocks to hold each end of the razor, so you can really seem them rather than the dividers.

Any suggestions for really simple notch blocks? I was thinking of trying to find some foam in my firm's mail room and cut it to size by hand.

Any better or simpler ideas?