Vector remapping with u and v in different files

In JRA55do, the source files provide u & v components of wind vectors are in seperate files.

CDEPS has capability to remap vectors when the data is within the same stream, however streams require all variables to be within one file (for any timestep).

Our preference is not to have to modify or make copies of the original forcing files but there doesn't seem to be any other way to do vector remapping for these fields? The requirement that all variables are within the same source file for a stream, and that each stream is remapped individually appears fairly ingrained in the implementation of CDEPS?

Does anyone have any suggestions on a not terribly complicated way to implement this ?

as an example, we currently use this:

```

cycle
1.0
single
patch
1900
1900
1900
null
./INPUT/JRA55do-datm-ESMFmesh.nc
null

./INPUT/RYF.uas.1990_1991.nc


uas Sa_u

0
linear


cycle
1.0
single
patch
1900
1900
1900
null
./INPUT/JRA55do-datm-ESMFmesh.nc
null

./INPUT/RYF.vas.1990_1991.nc


vas Sa_v

0
linear

```
and would like to do something like:

```

cycle
1.0
single
patch
1900
1900
1900
Sa_u:Sa_v
./INPUT/JRA55do-datm-ESMFmesh.nc
null

./INPUT/RYF.uas.1990_1991.nc
./INPUT/RYF.vas.1990_1991.nc


uas Sa_u
vas Sa_v

0
linear

```