Eduard of the Czech Republic had released a 1/35 scale photo etched (PE) upgrade designed for the Trumpeter SU-152 Late, kit #05568. This upgrade consists of two PE sheets packaged in a sturdy, cardboard-supported bag with a two-page instruction sheet.
I used Trumpeter’s SU-152 Early kit, #01571, for a few parts since I was already doing a review of it. There are only a couple differences between the early and late SU-152 and this kit would work on either quite well.