In my EasyStar I'm running a MEGA. It's a reliable and efficient motor. I usually hang out in the FE boat section as I race FE boats. I've rarely had a motor cost less than a boat hull or plane kit. I run MEGA's and NEU's.

If you want a similar sized motor look for dimensions of 28mm x 35mm or so. Kv should be 1200-1800 if you want to spin a 7x4 on 11.1v

Ryan