S13 Head unit

Looking to install a double din apple carplay head unit into my 1988 s13 just curious as to what people are rocking value wise, also has an aftermarket sub behind the seat so do I have to be careful of which unit to get or are they pretty universal? My first time owning an older car just looking to spruce it up a bit

Also looking to mount the gauges a bit better I see a lot of them are just 3d printed the vent ones, mate says he can 3d print me one not sure of the quality I guess I have no idea how 3d printing works curious to see what people recommend for that, it’s rhd and I’d possibly get an angled set of 3 for the temp and pressure gauges (the gauges currently have a like plastic band I guess around them but sit in the head unit ‘loosely’ they don’t move around they just aren’t mounted)