Chapin Charts with Dia?

[Jamin Collins <JaminC adapt-tele com>]

Does anyone know if there are Chapin Chart symbols for Dia?  A good example
of chapin charts, for those that may not be familiar with them, can be found
at http://www.open.org/~prslkg/sy_chap.htm.  Or perhaps someone here knows
of another tool for creating these charts?
 
Jamin W. Collins