I think you're looking for this : http://maemo.o-hand.com/

... and the files are there : http://maemo.o-hand.com/packages/bora/

I tried to install them but there is a package conflict (evolution-data-server).
Maybe it works on scratchbox, I'll try soon.

EDIT : It's working under scratchbox !

EDIT2 : Sorry, it's not GPE, it's an other PIM called Poky/Pimlico !
For GPE 2.8 you'll have to wait for kernelconcepts guys to compile deb files or you could try yourself from the tar files if you know how.