Prilled soil amendments are coming and will eventually replace the powdered versions due to a finding by the Labor Department as it relates to worker safety. It will come to the retail market soon enough.
CC
I was in the same boat as you and used the Espoma pelletized garden lime. Everything was great for about the first month, then the pH went up like crazy. This is in a peat-based mix. All that I can figure is that the pellets made a balloon payment! I just ordered a mortar & pestle because this is all that I can still find, and I thought that this might be the best way of grinding it up.
Would hydrated lime work instead of dolomite lime? That's all I could find.
In a pinch, hydrated lime will work, but you want to use it at 1/4 or 1/3 the recommended application rate of dolomite lime (in common container soil mixes... NOT whatever it says on the hydrated lime package).
For instance, if your recipe calls for 1 TBSP of dolo lime per gallon, you'll want to try 1/4 TBSP of hydrated lime as a replacement (while you mail order some dolo lime).