3 pin supply for HDD Player

[Killer5010]

I am trying to connect my HDD player to my rearview mirror Display.

 

The input required is 5.6V 2A. Seems to me that the current for the cigaratte output is only 1A and cant drive my HDD.

 

I am thinking of tapping the batt source to a wall mounted 3pin input so that I can use my adapater (supply by the HDD player) to power the HDD.

 

Anyone know of any workshop that can do this ?

[Mongater]

you need a 5.6v DCDC convertor or 12dc-240vac inverter.. the 5.6v DCDC convertor are rather hard to purchace.. at most you can only get a 12-240AC inverter 450W and above which cost about $80