I was also thinking of one of those GWS A10s. Earlier you mentioned no brushless replacement for the little IPS motors in the EDF 50s, there is one I know of. It's made by Feigao. I have one in a GWS EDF 50 in a little jet wing I made and it's impressive on 3s LIPO's with a 2030 3 blade. you can check it out at balsa products www.balsapr.com.
They also have thrust data but be carfull I think the AMPs are of, I burnt up a 5AMP ESC. I get 152g thrust on a Feigao 1208428L with thunder power 3s 730mah. and Phoenix 10 ESC. I haven't done the figures but I believe this set up will be a lot cheaper as well.