22" Vittoria Juniores Tubs / sew-ups + rim sizes

Hereford Flyer
Hereford Flyer Posts: 26
edited March 2009 in Workshop
Trying to track down any stocks of 22" diameter Vittoria Juniores Tubular Tyres. (yes little tiny tubs). For my daughters mini road bike.
http://www.vittoria.com/index.php?optio ... Itemid=116

Also does anyone have any ideas if there are any clincher rims + tyres which could be fitted as alternatives. The ERD for the current sprint rims is 463mm. Any ideas?