i noticed that in europe, and in france for me, we don't have the same tail light.
I saw a lot oh R1 tail light on the forum, but we we've got this one:
and for the plate support, i use a wr250f support and adapte it
herehttp://www.yamaha-nice.com/boutique/partie-cycle/3365-support-de-plaque-wr450f.html
it cost only 30€.