Good Quality Emmc reballing stencil .

Hello masters ,
Could anyone please recommend any good and high quality emmc stencil for reballing emmc , i used few stencils but all of them get useless after one or two use , when heat is applied it rises upwards creating improper balls on the bga . The stencils available in my local area are crappy and expensive , I would highly appreciate if anyone could post a link to good quality stencil they are using and having a good experience . TY.