Apple’s LCD manufacturing partners, including LG Display and Samsung, are facing a steep challenge in trying to build enough high-resolution displays in time to be included in the iPad 3, according to a new report. Citing a source who is in contact with Asian suppliers, Cnet reports that Apple is seeking to include a 2048x1536 resolution display in the iPad 3, quadrupling the number of pixels seen in prior iPad models. “They have production…