Replacing IR/low-pass filter on JVC GY-LS300

I have a JVC GY-LS300 with a bad scratch on the outward facing piece of glass. I believe this glass ia a "IR/low-pass filter", although I have not formally verified it's actual function.

The LS300 is a micro-4/3 professional video camera with a set of internal ND-filters. The way it's built, there is a rotating assembly of ND-filter, with the camera sensor at the back (inside the camera) and this other piece of class at the front, where the lens would attach. I'm assuming this piece of glass plays a role at filtering out infra-red light, and possibly as a low-pass filter to reduce aliasing.

The scratch on this piece of glass is bad enough to create a shadow in the recording and therefore it needs to be replaced. Everything else about the camera is working fine.

This may appear to be a straightforward repair: open camera, replace glass, done! This would be the case with most Canon, Sony and Panasonic cameras.

Unfortunately, the front-end assembly of the LS300, with filters and sensor, is glued together with epoxy, making it impossible to open up (the glued-on board blocks screw heads) and replacing a single component is proving a challenge. Furthermore, it has been impossible to source a replacement filter.

JVC states that the whole assembly must be replaced, and the cost of the part is more than the value of a new camera.

It may be possible to replace the filter with a similar part from a different manufacturer. I'll only know if I can open it up.

My question is: does anybody know if cutting an epoxy assembly like this one has ever been done?

Any advice?

Here is a Dropbox with a set of picture: https://www.dropbox.com/sh/w7lk6o6ygkdor...

Thanks