Ahah! I have certainly gone down this rabbit hole before. This was a big question that was hanging over my classroom when the bulb went in my last one. The bulbs being excessively overpriced!
In the end, I might have another option for you. A large TV.
Using a HDMI, plug in your laptop, off you go.
Made my life a whole lot more simple, and until writing this reply now, I had completely forgotten my consistent rage at the message: projector overheating, it is being turned off.
Tim
I needed a portable solution. A large TV wouldn't help. :)