Hello Craig,

The ref. for the first marriage is on Brian Lawson's website: http://www.lawsons.ca/marriages/g_mar.html
Name Date Dis Vol Page
GAWNE, Sophia, 5 Aug 1888 R bri 9 SKINNER, John.
You can order this cert from the Registry: http://www.gov.im/registries/general/civilregistry/

The second one is pre-civil registration, but the parish register should have details of occupations, addresses, fathers' names, etc. for the marriage, earlier records of their family bapts., plus burials. The films can be ordered to view at the Manx Museum library or at any LDS Family History Centre worldwide.
Parish register transcripts of Kirk-Bride, 1693-1883:
Baptisms, marriages, burials 1693-1849 are on LDS film no.106713
Christenings, marriages, burials 1849-1883 are on film no.106180

Sue