Version of Cello Prelude 1 for viola without clef change.?

I'm have an audition this fall and I have learned the cello prelude using a free version from 8notes. In all the free versions i've seen the last section with all the shifting the last part is in Treble Clef. I really need to find a version that is FULLY is in alto clef (Preferably under $20.00) links would be appreciated