I think the shop you bought your helmet they have it for sure, I always use it in winter and helmet's screen is always clear even in hard rain
Sent from my Samsung Galaxy S8 from the future
You can also use a water repellent spray, that we use it on a helmet screen, i have use it in a similar problem on the back break switch and i saw good results
This is the original dna page of Greece (http://www.dnafilters.com/en/products.html?pid=67&sid=1679:XCITING-400i-13-14l) you can ask them if they can send it , optional you can try this page (http://www.tecnomoto.gr/Product_ENG.asp?ID=27542) and ask them the same .
ps from the second page i have bought mine.
I just bought today for a friend, DNA for (xciting 400i) filter with cleaning kit for 72€, 55€ for the filter , 17€ for the kit, 15€ cheaper than i have bought it in November.
I saw this image , from the abs model , and i was wondering if mine (non abs) has the parking brake light too , but unfortunatelly it doesnt
Froyo greets Jan Too