RDBMS HOME=/u01/app/oracle/product/10.2.0/db_1 ASM HOME=/u01/app/oracle/product/10.2.0/asm_1
I dont see why the asm home cannot be cloned. Its still standard rdbms home at the end. You may want to install the new asm home on new server and just copy init.ora and few other files.
Its really doesnt matter since asm diskgroups can be mounted on new server in any case.