[gmx-users] Old charmm force field

[Sanku M]

Hi
  I need to reproduce a simulation result which had been performed using a very old version of charmm forcefield (PARAMh19 forcefield). In order to reproduce it correctly, I would like to use same forcefield that had been used there.
I wonder whether there is any gromacs version of this old charmm forcefield? If not, is there any any existing script which can convert the charmm forcefield to gromacs format?
Thanks
Sanku