First thing you need to do is not fit the Ceramic pickup if you want a proper old school Stingray tone, only mid 90s to late 2007 Stingray 5s used ceramic pickups, they sound great I love mine in my oldest SR5 but its not what you want to get what you want, stick with Alnico for the pickup, the East preamps are great, I have the 2 knob 2 EQ version but I would have gone for the sweepable mid one like mcnach other than I wanted to keep it sort of standard as its in my Classic5 bass and the reason I bought it was as a 5 string version of a pre EB Ray which are still my favourite basses, they just lack a string for me
The Stinger ones off ebay are meant to be very good and give a proper Ray sound for not a lot of cash either.