You can use Kiten's radical search dialog to search for Kanji with a combination of radicals and a certain stroke count. Choose Search->Radical Selector to open the radical search dialog.

To choose the radicals you want to be in your Kanji, select them from the middle listbox. To display possible radicals to select from this listbox with a certain number of strokes, choose this number of strokes from the spinbox just above the listbox. The radicals you choose will appear in the listbox to the right.

To choose how many strokes your Kanji should have, just enter the values into the spin boxes below the results area.

To perform the lookup, press the button that matches the kanji you wanted to look up.