You can use "locate" or "find" command on these modules to find where they are , for example
[root@localhost core_src]# lsmod
Module Size Used by
iptable_filter 2793 0
ipt_MASQUERADE 2466 1
iptable_nat 6158 1
vmware_balloon 7199 0
i2c_piix4 12608 0
i2c_core 31276 1 i2c_piix4
shpchp 33482 0
ext4 371331 2
mbcache 8144 1 ext4
jbd2 93312 1 ext4
sd_mod 39488 4
crc_t10dif 1541 1 sd_mod
sr_mod 16228 0
cdrom 39803 1 sr_mod
mptspi 17051 3
mptscsih 36828 1 mptspi
mptbase 94005 2 mptspi,mptscsih
scsi_transport_spi 26151 1 mptspi
pata_acpi 3701 0
ata_generic 3837 0
ata_piix 22846 0
dm_mirror 14101 0
dm_region_hash 12170 1 dm_mirror
dm_log 10122 2 dm_mirror,dm_region_hash
dm_mod 81692 2 dm_mirror,dm_log
[root@localhost core_src]# locate vmware_balloon
/lib/modules/2.6.32-279.el6.x86_64/kernel/drivers/misc/vmware_balloon.ko