if you were sentenced before 12/20/2012 any upgrade in your sentence is now void. I know this because I am in the same boat. I went from 10 years to 15 years. Now, I will be removed due to Commonwealth v. Neiman and Commonwealth v. Muniz. HB 1952 will not affect those who were sentenced to 10 years before 12/20/2012.
If you want to file a writ, you have to draft your own motion. There are no templates.