Civil registrations of marriages were compulsory only from 1884, so certs are generally available only from then.

The Maughold parish register has the details of their marriage as:
22 Jan 1867
Owen JONES, Full age, Bachelor, Quarryman, [residence] Ramsey, [father] John Owen, Quarryman, and
Jane COSTAIN, Full age, Spinster, [residence] Ramsey, [father] William Costain, Joiner.

There was an earlier Owen Jones in Maughold records: Rose daur of Owen Jones & Margery Christian bapt Parish Church on 14 Apr 1799.

Jane Costain possibly bapt 26 April 1846 Ramsey, daur of Wm COSTAIN & Ann WATSON.

Sue