Since you dont do mods you can buy one modded for you but it will cost you a pretty penny
https://www.atari260...--PROD7828.html
Also keep in mind that the atari 2600 was designed to be viewed on standard CRT TV monitors not hi def flat screens. High def TVs will give you sharper cleaner lines but the atari graphics where actual designed to blur a little on standard CRTs so they would blend together and look a little less blocky. For evidence of this play a cart with an awesome sunset on it, like Barnstorming or BMX Airmaster, on a CRT and a high def TV (or even an emulator) and you will see the sunset looks a lot nicer and a little more "natural" on the standard CRT.