Take a look at the CarTech site and some of the BioMed/BioMaterial web sites. Remember the FDA does not approve a material per say but approve the process or device etc based on the information they are given in how it will be used. If you have a specific question or area of use I would be glad...
One inch can be hard to come by. Try CarTech first. Fort Wayne is an excellent place as well BUT they do not do their own melt. They do draw down, but don't often have such a large dia.