You can remove the lens and clean it. As far as I remember you can access the optical-system from the front without taking the projector completely apart.
If the resin is still liquid it should be no problem, if it hardened you might be in trouble.
If you find a replacement of the same type for your projector, obviously you can take out the gasket and distance holder from your old projector and put it in your new projector. It's relatively easy to access - if you removed the optical system for cleaning, you will have seen it.
If the gasket doesn't fit, because you use a different projector type, you can cut you're own gasket from "rubbermat" or print one with an elastic resin. I used a resin from Spot-A when I switched the 1.0 projector to a DH910 - works for two years now.
When you choose a different projector, choose one from Vivitek, that has the same serial interface, so it can be switched on and off and have it's bulb hours read by the B9 controller board.