in this case, you want to import from a checkout you did a time ago from a development tag, so its no easier to just use export, rather you can you something like this:
find /your/oacspath/ -type d -name CVS -exec rm -fR {} \;
find /your/oacspath/ -type d -name CVS (will show you CVS dirs)
find /your/oacspath/ -type d -name CVS -exec rm -fR {} \; (will erase the dirs)
if you do again:
find /your/oacspath/ -type d -name CVS
it won't find anything!
(always make a copy of your files just in case)
And then you can simply import that dir into a local repository.