Don't put that broken valve back in your bike.
I just placed an order to CMS
http://www.cmsnl.com/kawasaki-kdx200_model11766/
Here's an itemized list in US dollars:
one (1) Valve Exhaust LH #12005-1121 - $ 44.48
one (1) Valve Exhaust RH #12005-1122 -$ 44.48
one (1) Spur Gear, Idle #59051-1206 - $ 23.11
Three (3) Valve Collar #92143-1147 - $ 20.80 ($ 6.93 each)
Shipping - - - $ 37.55 (to U.S.)
Total - - - $ 170.43
These look to be original parts, not reproductions. You can look at my photo above from when I placed my first order. I have not had any trouble getting my orders, just a little pricey because of shipping and exchange rates which your credit card converts for you. Worth it if you love your E-Series!