Did you already try eBay, Amazon and Chinese stores? Other than that, just find a broken as fu PSP on eBay, ones without an LCD to even lower the price even more, and just get it from that. Don't be shy, look for it hard!
Hello, just wanted to get a little more information about your situation... So is it stuck on the green Android screen? Can you go into recovery/bootloader at all? If you don't know how, go here (you may try the steps it gives you, just keep in mind to backup your information or have it all on SD card first: http://www.fixya.com/support/t16090438-zte_warp_phone_stuck_android_logo Let me know how it goes.
I realize that the motherboard is on the back of the LCD assembly, I'm foreseeing heavy blows to the LCD assembly may have a potential to reach the motherboard right behind it, but I could be exaggerating.