Check out this device. It may be what you need:
From: Kevin Kowalewski [mailto:email@example.com]
Sent: Monday, March 21, 2011 22:08
Subject: [Gumstix-users] Different LCD & Touchscreen?
Needless to say the touchscreen and LCD combo on the Palo35 and Palo43 are less than stellar. With OLED's that have brilliant contrast, viewing angles and display density on today's cell phones to a large 320x240 display at 3.5", the display density and clarity is quite low. The blurring effect of the resistive touch screen does not help.
Has anyone used the Overo platform with a more well suited LCD & touchscreen? I know the Palo35 and Palo43 boards are designed specifically for the 3.5" and 4.3" displays with their respective touch screens but has anyone else used a better combination?