I am a member of the Stathopoulos lab at Caltech, and we recently mapped the insertion sites for the two P-element insertions in Bloomington stock #5137 and its derivative stocks that previously had minimal molecular information. The precise mapping data is below (fly genome release 6 for coordinates). We used inverse PCR for the mapping using a modified version of the protocol by Rehm (https://www.fruitfly.org/about/methods/inverse.pcr.html), using MspI to digest.
P{UAS- mCD8::GFP.L }LL5 (/reports/FBti0012685.html)
-minus orientation
-between bases 2R:11371058..11371059
P{UAS- mCD8::GFP.L }2 (/reports/FBti0180511.html)
-plus orientation
-between bases 2R:18611931..18611932