Default [A510][Q] 1.073_WW_GEN to newest EMEA ?

Hello,

I am currently running my A510 on 1.073_WW_GEN1. It has been sent back to Acer service twice but it still is affected by the touch screen issues.
I would like to test it with one of the newest 1.09x_EMEA_xx ROMs but I couldn't find any info on how to migrate from WW_GEN1 to EMEA_CUS1 or EMEA_DE.

Any clues?
Thanks.
Silver Bullet
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Nexus 4 16Gb, Nexus 7 32Gb