You can use any 200W DC Low Voltage Ignition burner on this. BTW, to avoid any confusions, I am aware that your one is a 160W but the burner installed has a max rating of 200W.
It is possible to use a lamp of an alternative projector. I know the InFocus X1 lamp and the BenQ MP510 lamp is identical to your one. If you remove the lamp from the housing, you can just put it in your housing and it is a straight fit. Same burner and reflector (bare lamp) just different makes. Saves you messing around with burner and all that. So that widens your choice a bit.

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Operating voltage is irrelevant as all 200W DC burners have an operating voltage of around 75V. What is important is the ignition voltage as the Low Voltage Ignition uses an ignition voltage of about 5KV to strike the burner whereas the High Voltage Ignition burners use a voltage of anything upto 15KV to strike the burner. Your projector takes a Low Voltage Ignition Burner, therefore replacing it with a High Voltage Ignition burner may take more than one attempt to light. In worst case scenarios, it may fail to strike at all.