http://apico.co.uk/new13/wp-content/uploads/2015/04/Beta.pdf
Just found that link on line. I have purchased sprokets, master cylinder covers, shifter, air filter.
Prices are decent. I got mine from Langsoffroad.com in ontario canada
I am not sure who else can get them or who the distributor is.
I really like the front sprokets. they fit on the spines really really nice with no slop. and their apico air filters are made by twin-air. when comparing them to my twin-air that i have already, they look to be the same material just different color but they are about 20$ when the twin-aior is 39$
So pick up two for the price of one.