We fretted over this issue a lot. First, we had a hard time finding an accompanist. One decided she was too busy, one got scared after seeing my D’s classical pieces:). We finally asked one of the HS choir directors in our district, who also accompanied my D last year at Solo and Ensemble competition. We recorded at the HS where he works.
While we were there videoing a few songs that needed to be live, he also recorded tracks for the rest of her music. He used an electric piano, so he could record the tracks while she was singing, so the tempos would be correct. He then burned the tracks to a CD, that I uploaded to my computer and into ITunes. I then put them into Garage Band and edited them as I needed. My D took all of the tracks she needed and put them on her IPod. We used the tracks for her prescreens by playing them through a bluetooth speaker. I’m hoping the IPod, bluetooth speaker thing will work for Unifieds as well:)… I was about a day away from using PianoTrax.com and I still think this is an amazing resource.