a) I have the3 MasterCool 71475 flaring tool kit. You have to watch the stainless tube because it comes in various wall thickness.If you buy too thick of a tube the tool will break every time. You might want to call and talk to Mastercool or perhaps someone at Eastwood?

b) For getting a roll of tubing longer than 25 ft. I'd call these folks and see what's up:

http://www.tiautomotive.com/bulktubing/double_wall.php