These repro parts vary considerably in quality, not sure about one but it seems quite good. The glass should be replaced for a flat one but it's the correct model DU142 model it seems.
The headlamps look ok, have one on my M33, switch works fine. The headlamp glass was easy to take out and change, I fixed the new glass in with Evostick.
The only thing I can fault it with, if you're doing a Military restoration, is the fixing clip at the bottom, most military bikes had a big knurled screw and hardware there, but then, I'm a very bad rivet counter!
To modify is possible, but means drilling holes in the rim, and making a slot, and buy the hardware from me!