HI
LPC2468 is NXP old product. It will be end of life soon. The bsdl file is not avaible on website anymore. User can consult other bsdl library site, for example https://bsdl.info/index.htm
If you want to start a new design, I don't recommend you using LPC2468 any more. I suggest you considering iMX RT, iMX,etc.
Thanks,
Jun Zhang