There was a recent post that suggested using grounding strips/grounding bars to avoid the need for jumpers. These seemed to be a cost efficient approach at $5.58 for 9 terminal (you can have more than 1 wire in each terminal hole).
http://m.homedepot.com/p/Squar...t-PK9GTACP/100161420
Good luck and please update us when you get a chance.
Thanks,
JD