Just a friendly reminded that this is a public forum. What you put on here, everyone can see. Deanna has kindly jumped in to protect your privacy :-)
The get a replacement SIM you need to contact Boost on 125 8881 or via Live Chat at http://livechat.boost.com.au and request that a special blank SIM is sent out to you (it should take a few days to arrive via courier). Make sure to advise Boost customer care of which size SIM you're after, standard or Micro (if you're coming from a Nano SIM), or standard if you're coming from a Micro SIM.
Once you receive the blank SIM contact Boost again and they will transfer your number on to the new SIM.
CORY | I do not work for Boost or Telstra.
Boost Care: 125 8881 or 1800 026 678 . Or Live Chat 24x7: http://livechat.boost.com.au