WinUAE can format n hard drive to go in an A600, but you'll probably need a 44pin (2.5") to 40pin (3.5") adapter which will probably cost more than a new floppy drive.
Jens Schoenfeld of Individual Computing
http://www.ami.ga is considering making a new 68030 accelerator for the A600 if he gets enough interest.
No-one is going to
give you an A600 accelerator, they sell for about 250-350 UK pounds (
See Here) ~500 Euro!