The latest OTA for the Motorola Xoom GED is here: http://android.clients.google.com/packages/ota/motorola_tervigon/75baa1719d30.signed-tervigon-JZO54K-from-JRO03H.75baa171.zip
Minus seems to have blocked uploads from non-image files so I can't post a minus mirror sadly.
It applies via OTG cable with stock recovery too as per honeycomb OTAs
