I beg to differ.
I think it's simple enough for professionals to take apart. Nexus 4 Teardown - Disassembly & Assembly - Screen & Case Replacement - Drop Test Repair - YouTube
Then there's also this place to go for parts, though the price is on the high side:
LG Nexus 4 E960 Parts
Even if you can find someone who would take the risk (irreparable damage) to repair your device, it will be very costly. High chance too that he will not be able to repair your device.
FYI, LG USA charged US$72 for the repair charges.