Default need 2 modems i435 and l520 cmw flashable

I have been googling for a day or so I need 2 cmw flashable modems compatable with the sch-i435 and the sph-l520.
any help or pointers would be greatly appreciated.
Thank you
samsung galaxy i717 note / traded for a s3 for the wife.
im now using a Verizon gs4.
using net10 wireless service.
unlimited everything
$50 dollars.
not used to locked up non gsm phones.