If all else fails, consider hardware-modding the unit to accept a Raspberry Pi or an Android Auto dongle, but that is a story for another article. For now, grab a CD-R, find that elusive RAR, and bring your Carrozzeria back from the dead.
: Community sites dedicated to JDM car imports often host legacy boot files. Boot Disk Pioneer Carrozzeria Avic Drv250 Japanrar