I'll second that - I picked up a cheapie car headlight at the local car parts place for about AU$17 when some fool on a rocket 3 kicked up gravel in front of me. Again no provision for parking light (take the bulb out and tape it up to the other wires in the bucket) but a much improved low beam pattern and around 10% of the triumph price.
If you have a choice between the sealed or semi-sealed I'd take the semi - that way you can continue to use the standard bulb and replace it at gas stations in the middle of the night when it's most likely to blow.
