Quoted from WillG:It sucks. bgresto.com can make one if he can get a glass to scan. Give them a try.
BGresto made me a new glass after the original shattered in transit. It's beautiful.
As for the remains of your Future Spa backglass, crush all the pieces until you have nothing but small nuggets. Put them in a large glass vase, add water to cover the pieces and put flowers in it. A nice conversation piece and your wife might like it.