I just got an email reply from ESS. It says that they are currently debating whether they will be developing a kit for the N52 or not. They responded with:
"We will make a decision this fall on wheter [sic] to proceed on this project or not"
Prototype 2007 Monaco E83 'X3M' | N54 Swap | Gruppe M CF CAI | VRSF CP & DPs | CXR Intercooler | ER Dual Oil Coolers | Dual 2.5" w/X-Pipe | M3 Rear Exhaust | 20" BC Forged HB05 | Michelin PSS 265 & 305 | F10 M5 & F80 M3 Brakes | KW Variant 2 | H&R Swaybars | TMS Z4M Camber Arms | Z4 Finned Diff | BMW Perf. Grills w/Tri-Color | Custom M Aerodynamics | CF Trim | M Perf. Carbon Shift & Handbrake Knobs | BMW Perf. SS Pedals | M3 Dead Pedal | V1 Hardwired | Int LEDs | Umnitza Orion v4 AE & More