WHAT BUSHINGS WILL WORK WITH LASER DA TRUCKS?

I just purchased some DA trucks for my newer Laser plates and would like to know what bushings can be used as replacements? The black (88a) bushings that came with the trucks are way too hard for me (I am 150lbs or 68kg) and I need something softer. I know it has become difficult to find bushings and hope someone has an answer.