Jerry,
I don't see how what you describe would be possible. No block set has 0.000x blocks for obvious practical reasons. Most of them have 0.100x blocks.
That means that, if the required height is of the form 0.abcx, removing the 0.000x portion by using the 0.100x block will automatically reduce the required height in the tenths (a) position by one.
Unless you're a closet metrologist, you only need to control the stack height to a few thousandths for the kind of shop work we do. An adjustable parallel and a micrometer will provide more than enough accuracy for most jobs.
Also, while I've written a program to calculate the stack height, all one really needs is a $10 scientific calculator - every shop should have one. Then the stack height can be calculated thusly..
enter angle
press 'sin' key
press 'x' (multiply) key
enter sine bar length
press '=' key
voila, the stack height is shown in the display.