Sure, indirectly.
Add an option to your command like
-write_3dD_script RUN_3dD.tcsh
(and possibly include -write_3dD_prefix, though that is easy to edit).
That will generate a 3dDeconvolve command script that *assumes* all of the rest of the processing has happened, with a variable for a new output prefix.
You could possibly modify the regression options first, as it might be easier to modify those options in the afni_proc.py command rather than in the 3dDeconvolve command.
Note that it will generate a script in your original directory (e.g. where the proc.* script would be written to), but it is designed to be run from within an existing 'results' directory.
Anyway, give that a try and let me know how it goes.
- rick