Emigration to South Australia

Does anyone have connection to the following family members or can find any records locally:

James JOHNSTON and Margaret SPRATT married c.1845 possibly Trory, Margheracross or similar.

Emigrated to South Australia in 1852 with two sons Arthur ( 5 yrs) and John(infant).

They named their property in Clare, South Australia "Rakeelan" possibly after the  townland they left_ Rakeelan Glebe.

Margaret's father William and brothers John and Thomas also emigrated but a little later. John married Elizabeth KIDNEY in Margheracross on 23 April 1853 before emigrating and Thomas later married Elizabeth's sister Margaret in Penwortham, South Australia.