Default Qi Wireless Charging on SII HD LTE i757

I have a i757M, and have been looking into wireless charging. My phone has the charging port inside the back cover (like the S3, S4, and S5 etc), but I have been unable to find a Qi receiver made to fit this phone. Does anyone have experience either finding one that works, or modding one? It lookes like some of the S4 receivers may be fairly easy to mod....
GCzII forum
Samsung SII HD LTE (aka Skyrocket HD)
next phone: Samsung S4?