>  I tryed to find the parts at several on-line distributors but was not
able   >  to.  I prefer the thru-hole since I would want to wire wrap it
rather than   >  make a board.


And you found this to be unusual.  Most of the projects from Radio
Electronics that I have been interested in have hard to find obscure parts.
It almost like the plan the projects so that the parts are unobtainable.