is something like this maybe,
http://www.hksrc.com/store/index.php?route=product/product&product_id=7877
or
https://www.integy.com/st_prod.html?p_prodid=10928&p_catid=59#.Xi30NiNlCUk
i do not like that it will limit the motor size though. and doesn't show what sizes it can accommodate.
the...