Hi
I'm not quite sure how much of this you already have - but according to the Mitchells' book of Renfrewshire MIs, there is a mural tablet in the following (abbreviated) terms where "-" represents an illegible bit:-
Revd Clement Moscrip ordained Bathgate 1829, inducted Pollockshaws 1842, d -0.9.1848 4-y
The church in question was the Pollockshaws Associate Synod (Burgher) church, which joined the Free Church in 1849 and became known as the East United Free Church, Pollockshaws. So, while I don't have access to it to check, I believe the Fasti you require in this case will therefore be Small's "History of the United Presbyterian Church" which (at volume 1 p138) is said by the MIs book to list the Burgher ministers from 1767.
PS - I see his father buried at Greenock in the index - you have indicated above that you have seen that stone but I'll respond separately to your other post on his father anyway.
Alistair