First, I have a question for you.
Why do you have to have a BBA to connect with your DC? What is the reason you can't connect with 56K?
Second, here is a possible solution...
I have found some websites that have VMU saves available in different formats. I don't remember the names of all the websites, but you can search for them. Some sites have Game saves available in *.dci and other formats. You could download those and stick them in your memory card with your PC to VMU cable. I believe gameshark.com has those saves available. You can also search through some of the links on this page:
http://www.hkems.com/m_main.htm
Just search around for game saves. Other than using your PC to download and transfer to a memory card, you'd have to get your DC online.
Hope this helps.
Later,
Ex