Sorry, but that just won't work. The device I've looked at that I believe will work is a Hitachi Airis II. It has just about the right field strength, working

Sorry, but that just won't work. The device I've looked at that I believe will work is a Hitachi Airis II. It has just about the right field strength, working volume and field uniformity for the prototype to have a chance of working. It's an older model and I have seen some for sale for approximately $30k.