Hi guys,
I got a Los Santos Mission Row Police Station to Los Angeles Police Department mod for you.

Installation:
backup your files
go to GTAV\mods\x64i.rpf\levels\gta5\_citye\downtown_01\dt1_19.rpf\
and replace 
dt1_19_lod.ytd
dt1_19_lspd02.ydr
dt1_19_lspd02+hidr.ytd
dt1_19_ground.ydr

go to: GTAV\mods\update\update.rpf\dlc_patch\mpheist\x64\levels\gta5\_citye\downtown_01\dt1_19.rpf\
and replace hei_dt1_19_lspd02+hidr.ytd and hei_dt1_19_lspd02.ydr

go to: GTAV\mods\update\x64\dlcpacks\mpheist\dlc.rpf\x64\levels\gta5\_citye\downtown_01\dt1_19.rpf\
and replace hei_dt1_19_lspd02.ydr

cheerio,
Mike