ive also done a DIY job with aftermarket neon tubes. What you need to do is look for the slim ultra-bright neon tubes. The tube on those is as thick as a pen. theyre about $20 each. or you could go for the strips if theyre as bright

to mount tubes you can either try your luck with double-sided tape or drill it into the plastics like i did. with the rear, i found the perfect place to put the rear neons where u can still fold the seats flat down with no harm done, but i might need to get fotos to show what i did

as for wiring, i paid someone 10 bucks to wire it to the cigarette lighter with wiring hidden away

looks great when its done