For racing purposes and to lighten vehicles, standard aluminium body parts may be replaced by some made of Kevlar.
We do not supply those as the demand is too small but we can give the adress of a guy who manufactured those parts for Discoveries engaged in 1998 Paris-Dakar race:
Contact Bernhard Borowitza at Kunststofftechnik in Passau, Germany
His business phone is ( 0049 for Germany)-851-754820.
Thanks to LRW for this information.