how to recover Mac OS X boot partition

Hello. I have Mac OS X 10.4 and Gentoo Linux dual-boot with yaboot on my
iBook/G3. Today I accidentally destroyed /dev/hda2, the Mac OS boot
partition, by using:

# mke2fs /dev/hda2

Is there a way to recover? If Mac OS X boot partition is pretty
standard, I guess I should be able to recover just by asking someone in
the mailing list to send an image of that partition and recover the
image. The following is my partition layout

zhangweiwu@esmeralda:~$ sudo mac-fdisk -l /dev/hda
/dev/hda
        #                    type name                  length   base      ( size )  system
/dev/hda1     Apple_partition_map Apple                     63 @ 1         ( 31.5k)  Partition map
/dev/hda2              Apple_Boot eXternal booter       262144 @ 64        (128.0M)  Unknown
/dev/hda3              Apple_HFSX Apple_HFSX_Untitled_1  75044712 @ 262208    ( 35.8G)  Unknown
/dev/hda4         Apple_Bootstrap bootstrap               1600 @ 75306920  (800.0k)  NewWorld bootblock
/dev/hda5         Apple_UNIX_SVR2 Swap                 1638400 @ 75308520  (800.0M)  Linux swap
/dev/hda6         Apple_UNIX_SVR2 Root                61276160 @ 76946920  ( 29.2G)  Linux native
/dev/hda7         Apple_UNIX_SVR2 Home                42229208 @ 138223080 ( 20.1G)  Linux native