the current prices are given in the link that jjjnettie provided, at the bottom of the page:
http://www.centralds.net/cam/?product=cds-1100d-uvir
CDS-1100D : Baader 2inch UV/IR Blocking filter installed $1,666.00
my understanding is that price is for supply of a pre-modified camera.
if you want them to modify a camera that *you* supply, the relevant prices are here:
http://www.centralds.net/cam/?page_id=5308