question on radiator slim fan size

i have an aluminum radiator on my ej2 right now and i have an h23 in the car... when the fan turns on it rubs on the lower tranny brace. i was wondering what size slim fan i should get? my radiator is 16" and i dont want to have to make any adjustments i want a direct fit. any info on size and where i can get a good one would be appreciated