fw_printenv binary file needs to be compiled

i am trying to overwrite mac address and serial number of a IPTV STB received mag254 which requires correct fw_setenv/printenv that doesn't have protection to overwrite ethaddr or serial#. here is the kernel version of stlinux its running Linux (none) 2.6.32.59_stm24_0211-MAG255 i cant compile it on device itself as it has busybox with very mimum install # fw_setenv ethaddr Can't overwrite "ethaddr" need u-boot-tools binary build for the device that will allow me to make this environment change post your bid if you have experience on embedded linux/unix and be able to compile this on your end and send me binary file