Where can I find a PRC-152 TM?

ETM on Logsa. I just found it there. You have to have access to the pull this TM. Many of the TMs we use are controlled and are not available to the public. If you can't gain access your supply specialist should be able to pull it. When I was a PL I had a copy of every TM on my computer and a binder with the PMCS for every piece of equipment.

https://liw.logsa.army.mil/etmapp/#

You should be able to request one from your supply guy. Or S6.