My appologies I read your 2.2A as 2A but that makes very little difference.
Can I suggest this: put an ammeter in the input line to the DVD player and measure what the maximum current is for all the DVD functions: loading a DVD, playing and ejecting. That will tell you what current it really needs. I would be surprised if it is 2.2A. Besides which, although the wall warts that I listed are rated at 2A they should supply 2.2A- they dont normally cut off at their spec limit- some may but it would be unusual.
The buck converter you mention,
**broken link removed**
will almost certainly power the DVD player without a heat sink. But this board level approach is not only more expensive (you would be buying 10) but will involve more work and problems.
My advice is to go for a wall-wart. I'm sure there is a suitable one.
If you lived nearby I could give you one- I have a heap of them.
I assume, as you have looked on Ebay.com, that you are in the US with 110V mains supply.
Intresting about you other activities. I used to do similar things!
I will have a quick look on Ebay.com and come back.