Ezystyles(Eric)
http://www.ezystyles.com.au/ can do the filter removal for $200(which enables the camera to cover a very broad spectrum) and can supply and instal the Baader UVIR filter for an extra $180. If you have a 2" or 1.25" UVIR filter, you can add this to the imaging chain and save $180, and have the luxury of many more options with the camera and other filters etc.
Eric may also be able to source the UVIR filter for you if you decide to modify yourself.