Prop Shop here in the UK do some very small props cast in various metals (aluminium, silicone bronze, stainless etc.). They're usually fairly standard types of prop though in this scale/size.http://www.prop-shop.co.uk/
Other than that, you will either have to make your own, or have one made to your spec ($$$$$$).
Another option would be to have one 3D printed.
There is this thread of the permit build- viewtopic.php?f=35&t=11272
Perhaps the builder would be willing to share his 3D file of the scimitar prop? You could email it to somewhere like shapways.com, and they can use that file to print a metal or plastic version in the size you specifiy.
As 3D printing is charged by volume, the cost should be very competitive.