As Ramey says, we need more info, but I'm going to throw this out there anyway.

"Wannabe" suggests someone unable to come up with anything original and who therefore resorts to merely copying those with more imagination. At the same time, though, "wannabe" suggests that the person is not actually successful and probably never will be.

Is this "Kopierschlampe" successful? If so, don't use "wannabe"... history is full of successful copycats and unsuccessful first-movers.

to name a few, take your pick

OR

low man/woman on the totem pole

I could be mistaken of course but I have a feeling that this is more of a reference to poorly paid office personnel assigned to "lowly" copying duties.. Seems to be used in blogs a lot.

--------------------------------------------------
Note added at 2 hrs (2012-05-02 13:48:34 GMT)
--------------------------------------------------

That's an evolving term with context being even more key than usual. Also, with "Schlampe", sexual connotations could play into it.

suggeestion, though not quite as derogatory

--------------------------------------------------
Note added at 3 hrs (2012-05-02 14:21:42 GMT)
--------------------------------------------------

jsut shows you how important context is. Depending on what is meant, copy-cat may be completely wrong,as Phil suggests

I like the emphatic sound of "file bitch", but have never heard it in the UK.
The British equivalent of a "gofer", i.e. someone who performs menial or trivial tasks for others, would be a "dogsbody".
For an office-specific context, it can also be qualified: "the office dogsbody".
This term is not specific to females, however, and can be applied equally to men or women.

Examples:

"She basically is the office dogsbody – making the tea; doing the filing; fixing the photocopier etc. But however lowly and menial her office tasks may be at the ..."

http://www.google.de/url?sa=t&rct=j&q="office dogsbody" "pho...

"It's all very well putting yourself forward for the odd task, but do it all the time and you risk becoming the office dogsbody.

http://www.microsofttraining.net/article-1126-how-say-no-and...

"The trials and tribulations of an office dogsbody"

http://www.google.de/url?sa=t&rct=j&q="office dogsbody"&sour...

"He was gofer and general office dogsbody for the first year, coming in at around five and leaving at around ten."

http://www.google.de/url?sa=t&rct=j&q="office dogsbody"&sour...

Schlampe used to be someone who can't keep order, but with time became 'slut'. If the context suggests something sexual, that's the way I'd go.