You'll need the complete assembly of lcd screen and digitizer because the trannies are in the screen itself, not in the digitizer. The whole thing will cost you about US$20 or less posted depending where you buy. Your digitizer is OK, that's the outer clear part you replace if the touch isn't working [but the screen itself still displays properly] and they only cost about five bucks.

I've bought from this seller before, they're both cheap and reliable. If you are unsure email photos of your screen and they will confirm compatibility before you buy. They'll also supply a set of case tools if you ask [pretty crappy and good only for one use mostly, but free with the screen]:
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I have a recollection of using a screen from a nuvi 50 with a fried mo for a 14xx too a while back. I think a few of the 5" models use the same screen, same as the 2x5W screen will fit some early 13xx but the 13xx's have 3 different screens. Best to always cross-check numbers on the actual part against the replacement offered and all good sellers will encourage you to do that before ordering.