Tha mian issues with pet specific blood glucose meters are they tend to be more expensive than a Human meter and test strips cannot be bought at any store.
Human blood glucose meters work just fine for cats, despite what your vet may say. Many people here use a Human meter: Relion, AccuChek, FreeStyle, Contour, OneTouch, etc. You can run to any Human pharmacy and buy more test strips if you are running low. Most people in geneal buy their test strips online from a Human diabetic pharmacy or Amazon.com or Ebay or other places.
The Relion is a good inexpenesive brand. It'sa Wal Mart only, though, so if you don't have a Wal Mart nearby you won't be able to get it or buy test strips. The brand is not sold on the Wal Mart web site.
The bigger name brands (OneTouch, AccuChek, etc) are sold in almost every Human pharmacy. You don't need a high end fancy meter with tons of bells and whistles. A basic meter that gives a blood glucose reading is all you need.