You wont need to replace the rear shocks, jus buy stock rear MP shocks or stock front Dominator shocks, you dont have to go expensive stuff here, jus get duratrax 1/8 buggy shocks or something like that, and the rims you need arent much either. Check out these sites for MP.
www.acehardwarehobbies.com
www.rc4wd.com
looking for another also, but gotta run to school.