You'll have to make sure that if that's not the original tailpiece, that its short enough to allow space to place the bridge in the correct position for the scale length of the guitar (so that everything is in proportion from the frets' point of view).
From your 1st picture it looks as though it might be too long ☹. Should be easy enough to find a short one, might be a good idea to look across the seas.
If you have a lot of time and know how to use a chisel, you could carve your own bridge. I did one out of meranti once upon a time:
http://www.guitarforum.co.za/setup-mods-and-repair/classical-guitar-project/. Then you just need a saddle and a nut, which you could do yourself as well, but its hard to get professional results.
For interest, the function of a tailpiece on this types of acoustic is to get rid of the moment (rotational force) that the strings effect on the bridge/top in a typical acoustic setup. This implies different bracing considerations for the top compared to a normal acoustic. You only have to design against the sagging of the top.
