fixed with and aligning without table

Consider the next example

key: value     key:      value  key: value
key: value     key:      value  key: value

the widths of the values are fixed, and one is left-aligned another is right-aligned.

Is it possible to accomplish this with blocks and inline objects instead of using a table object? 
I tried using a block with inner inline objects but text-aligning in inline objects isn't possible.
When I use blocks I get a linefeed after every block, so it is not a line anymore.

Patrick