I too build in 1/144 and have several of the Sram kits lined up. I'm not aware of any decals in 1/144. One of the wargames manufacturers (like Skytrex or Reviresco or someone like that) may do a sheet of German crosses, but I'm not aware of any commercial sources for personal markings and lozenge. The only option (and what I'm planning to do) is to scan my 1/72 or 1/48 decals, reduce them down and print on decal paper. If you do this, make sure you scan your own decals to avoid copyright issues.
The quality of the Sram decals varies. I made their Morane:
http://www.wwi-models.org/app/album/...odels&picInx=4
and those decals were fine, but I also have the DH2 and those aren't really usable. Poor colours and they appear to be dot matrix printed, as the dots are clearly visible.
Cheers,
Nigel