There are lot of sites you can get these. Here are answer to these questions.
1. As you said, Ipad baseband. So, it is part of the Ipad firmware. You will need to download Ipad 1 3.2.2 firmware which will contain Ipad baseband in it. I can put the link here but If you do a google search, it will take you to multiple places you can get this firmware to your computer.
2. Again, do google search for redsn0w 0.9.6rc16, use this and it will have that option for you.