The medieval kirk of Kilmorich was abandoned and a new building erected on the other side of the loch, at Cairndow (NN180107) (càrn dubh, ‘black cairn’).
At Cairndow you may see a medieval font, a broken grave slab and a damaged cross-head of possibly 12th-13th century date. These probably all came from the original kirk when the new building was built and the old site abandoned. It’s worth making a wee detour from the old Kilmorich site to Cairndow to see them.
Note that though the Cairndow church is now called Kilmorich Church on OS maps, it is not the original site.