UNIX for Dummies Questions & Answers

I want to execute something like this:

find . -type f -regex '$REGEX' -print | xargs split -d -C $SIZE

The problem is that I want the name of the split files to be the same name as original files. So if my directory has two files called abc.txt and def.txt, then I want the split files to be called:

abc00.txt abc01.txt etc and
def00.txt def01.txt etc

How can I do this?

for fileName in `find . -type f -regex "$REGEX" -print` ; do
split -d -a 5 -C $SPLITFILESIZE $fileName $fileName-
done

which creates the files like this:

For files:
abc.txt and def.txt

it creates:

abc.txt-00000
abc.txt-00001
abc.txt-00002
def.txt-00000
def.txt-00001
def.txt-00002

Is this the best that I can get?