Power Source Question

[BradZ]

Just picked up a few blue neons at a cheap price, i got 3 7 inch neons and one 24 inch for $40 so i figured why not. They are going to be put in my mates car (vx) yes i know its for the wrong team, but i cant see how it makes a whole lot of difference. Plans are to mount the 24'' in the boot, above the folded down centre to light up the subs, problem is they guy i bough them off has cut off the ciggy lighter adaptor part.

My question is where would be a good place to wire this neon to, needs to turn off when the key is switched off.

Thanks in advance.