In N. America/Europe these bikes have been sold by a number of distributors and they are know as "XF" bikes. The Asian market models were produced by Qingqi and were known as "QM" bikes. In the past, I could only find parts on Taobao under searches for "QM125/200/250". Qingqi has stopped making the QM bikes for the Asian markets, but these bikes are still manufactured for N. America and Europe by a Qingqi affiliate, the Pioneer Shandong Motorcycle Company.
I have emailed them before with questions and they actually responded..
pioneer@xfmotor.com.cn
jamesj2008@aliyun.com
Here is their website....
http://xfmotor.com.cn/index_en.html
Here is a set of spokes, not sure if it's front or rear. In the order notes, mention the specifics front/rear, disc/drum brake etc and a broker should track down the right parts.
http://engtaobao.com/item/taobao/547438230573.html
SSR sells spokes for these bikes, however they never sold the drum brake version of this bike so they might not be able to help if that is what you have.