Just buy a 7" touchscreen monitor if you want to fix it in the 2 din space.Otherwise go for some bigger sized monitors(like a 10" or so
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Mine is a 7" monitor.I don't know the exact prices,but it should be between 180-200USD(including shipping charges and all).And I dont know how to avoid customs duty.Last time,when I bought a boost gauge from Dealextreme.com,I got fined for not paying the duty.Just visit shortcircuit.com as raj suggested and check the terms and conditions.