How about one of these? Would one of these do the job?
http://www.hyperion-world.com/produc...ct/HP-DS20-FMD
I just got one last week and I think it is a really good servo and cheap ($AU52).
A fair bit stronger and quicker than an MG995, well it was compared to my rebadged MG995 I had.
Also a lot more accurate, and barely under/over shoots, really good centering.
Although a lot more than $8, but in after a while, you will probably wish you got something better.