Or, if u have no idea how to do that, i can give you an idea what i did 3 years ago, edit the vip system 1.7.2 i think, make 3 of them and edit each ZV to ZR and the other one ZV to ZC and the other one ZV to ZE
ZC means ZCommon
ZR means ZRare
ZE means ZEpic
and make it free access for anyone, this is the easiest way with less work to do it