@dreams I had the same difficulty trying to find a calcium citrate supplement that did not have other supplements and minerals. I found KAL Calcium Citrate 1000 (3 tablets = 1000) with nothing else added. I also take D3 in a formulation sold by my local Co-op: vitamin D3 1000.

I'm going to look for the Equate formulation that @hardingv mentions above. That may be more cost effective.