Manker U11 lens

Hey guys…
I have a small problem because I was stupid enough to drop my new Manker U11 at work, from about 3m high and broke the lens….
Can I order a new lens from somewhere or could somebody tell me the true size of the lens…?

You need 27.0-27.5mm OD 1.0mm thick glass lens.
You can try this one, but it can be to thick: https://www.fasttech.com/products/1606/10001022/1203400-optical-glass-lens
This should fit better: http://www.dx.com/p/glass-lens-for-flashlights-10-pack-26-9mm-x-1-2mm-10641#.WG4v1n3VVjM