mitochondria - Pancretic Acinar Cell - ATP, calcium concentration data

In this study, even though they have used fluorescence based method, they have reported concentrations.

When we studied basal intracellular calcium concentrations in acini from control rats they were in the low nanomolar range (140 ± 5 nmol).

For ATP concentrations you can see here.

Is it possible to find this information in a specific book or website, to avoid trawling though vast amounts of literature?

There is the human metabolome database. However, it doesn't have data for all cell types. Either more studies are required or the database needs updation.

Similarly there is the yeast metabolome database (you may not require it for your query but just another piece of information that I thought is worth adding).