Product review (4 stars): Joneca CSFS-WH-93 Mr. Scrappy Custom Sink Flange and Stopper Set, White
This works great for a new disposals but it will not work with older GE's from the 80's and 90's!  The mount on them are just different and these will not work.  They might work on newer GE's but not the old ones.  We have a white sink and it looks like the only way to get the right flange is to buy a new disposal!