What do you want to use if for? How much do you want to spend?
Do you mean this one (zu bladeworx Centurion)?
http://www.zubladeworx.com.au/all-products-c4/archive-c5/centurion-mk3-p100/
Are you in Australia? (I noticed it's an Australian brand). It can be tricky to import daggers from overseas into Australia.
I would suggest contacting a custom maker (there are many good ones in Australia) and asking them to make a knife similar to that one. That price sounds about right if you don't choose a super high end steel.