i'm trying to put together a simple setup for photographing consoles & i think i'm close to what i want but not quite

i've got it laid flat on a table with a ring light above it & i want the camera to point straight down through the light but on a tripod i can only point it down at an angle (see pic)

anyone have any ideas for how i could achieve this, if it involves buying something not-too-expensive i don't mind

what i tried already is a tripod extender like this which can get it in the right position, but my tripod is pretty cheap and it doesn't feel like the head part will hold up with the camera on the extension at a 90 degree angle cos it throws off the centre of gravity so much.
i don't really want to have to buy a new tripod

here's a test pic. i know there's dust on the thing