Linux_sch-r910 is a project mainly written in C and PERL, it's free.
MetroPCS / Samsung Indulge LTE Froyo Kernel sources
HOW TO BUILD KERNEL 2.6.32 FOR SPH-R910
Execute 'build_kernel.sh'.
If the kernel is built successfully, you will find following files from the top directory:
arch/arm/boot/zImage