You can get the roms from TjLaZer's website:
http://www.vintagecomputercafe.com/amiga.htmIf you want to find out which roms you have, hold down the right mouse button when you turn your a2000 on during the RCS screen, a boot menu should come up and have the plug-n-go rom version.
There are also software tools that will tell you what version of plug-n-go roms you have.
These tools can be found at the amiga hardware database
http://amiga.resource.cx/exp/fusion40and directly on Mattias Lundblad's web site (where he also gives TjLaZer permission to host the roms, including a link)
http://www.lundblad.net/mattias/f40.html
