Head unit upgrade 2003 parado LC4 (uk)

Hi everyone, I know this has probably been answered before, but I'm at a point where I'm about to buy parts that might not fit. I'm looking to replace the head unit in my first Land Cruiser and need some advice on finding a decent one that I can adapt to a double-DIN setup. Has anyone used side brackets for this, or do I need to replace the entire fascia panel?