Those are very, very cool. I love how you put an enamel behind the lettering. I could see that being an awesome way to bring some color to your bracelet. Unfortunately, at 300 per bead, they are not in my budget. Hopefully, if they grow in popularity other more affordable beads will become available. Thanks for sharing.
I have been doing a bit of Googling on a very cold miserable day and found this link where they make personalised beads.
http://www.jewelleryuniquetoyou.com.au/
They do two sizes one has 10 characters and the other up to 13.
I have had lots of fun playing. It will show you your finished bead. However I do have expensive taste.....