The area indicated on modern google maps as Highpark does not seem to appear on the 1st edition OSI maps (1820s,1840s) but is near to a distinctive kink in the nearby canal - see :
modern google map showing Highpark 1st edition map showing Highpark (click historic or historic bw to see the old maps)
There seems to be two possible townlands that could fit the location, if the the modern location is the same ...
Balroe, in the civil parish Kilbixy
Kildallan North, civil parish Templeoran
There's no sign of any surviving CofI records for the parish of parish Templeoran, but records do seem to have survived for Kilbixy, but only from 1815 for baptisms, 1815 for marriage, and appear to be kept in local custody. The RCB Library just have marriages from 1848. Unfortunately these do not seem to be available online at the moment.
Shane