You can buy a complete program called: Triangulations for HST and quarter square triangles measuring 3/4" (finished) to seven inches in 1/8" increments for about $30.
There have been a few sites who provided one size or the other of the grid, but why mess with sizes you don't want when you can have any size you need at such a reasonable price? The person who designed the Triangulations CD deserves our support and thanks.
Hope this helps <wave>
http://www.softexpressions.com/softw...angulation.php
speaking of which! For a nominal fee, you can download the whole system from the designing company! Talk about instant gratification! <wave>