Cheapest 18.5v brushless setup on E-maxx

I have been looking at getting a feigao 9xl motor w/ high speed bearings. BK electronics 12020 controller (with Maxamps 10,000 mAh 5s lipo pack, by my calculations this setup would run close to 600 bux w/ shipping, i have been into R/C cars since i was 15 ,kinda got out of the hobby at 18 or so, i am now 22. The e- maxx is the first electric truck i've owned. After doing some research b4 getting back into the hobby it was obvious that the technology of electric rc's has advanced exponentially and much more potential than Nitro could ever dream of. Since i cannot find the BK electronis 12020 in stock anywhere, can anyone give me a good alternative to this ESC