There is a diferent way to put two measures of FILL IN in only one, is change the tempo of the pattern, if the pattern's tempo is 120 BPM if you change the tempo to 60 one bar of measure will be two.
There is a songpattern of KETRON, the song Y.M.C.A., the real tempo of the son is 120 BPM, but the tempo of the style is 60 BPM, when you play the FILL IN the keyboard plays the solo drums and after the orchestral cuts,(before of "IT'S FUN TO STAY AT THE Y.M.C.A.) two bars in only one FILL IN,(the same is two differents FILL IN of one bar).
Regards