Hello,
Do you have the geometry? If so, you can remesh the geometry. Do you have access to Ansys WB LS-DYNA? It is probably easier to remesh the geometry in WB.
You can also remesh the geometry in LS-PrePost or you can generate a mesh without geometry in LS-PrePost. See the following training for more information:
https://ftp.lstc.com/anonymous/outgoing/lsprepost/Training/Intro/
Reno.