PL/SQL :: Bind Variable As A Literal String Value

Oracle Database 10g

Enterprise Edition Release 10.2.0.5.0

- ProdPL/SQL Release 10.2.0.5.0
- ProductionCORE 10.2.0.5.0 ProductionTNS for Linux: Version 10.2.0.5.0
- ProductionNLSRTL Version 10.2.0.5.0
- Production.

I have a problem when creating a dynamic statement. The problem is in the bind variable  ':OLD.CUST_NAME' ,..my question is is there an escape character to treat the bind variable as a literal string?

{code}v_str2 := '''CUST_NAMES='''||'||'|| ':OLD.CUST_NAME' ; 
 EXECUTE IMMEDIATE   'create or replace trigger trg_'  || SUBSTR (rec_cur.table_name, 1, 26) || ' before insert or update or delete on '                             || rec_cur.owner || '.' || rec_cur.table_name || '   declare   begin     if UPDATING then   FIFAPPS.ibug.log_errors('|| v_str2 ||'  );    end if;   end;';

{code} 

I want the output in a trigger something like this:{code}

if UPDATING then   FIFAPPS.ibug.log_errors('CUST_NAMES='||:OLD.CUST_NAME );{code}