Neither of those John Bell wills show up on the Irish Will Index (1484-1858) which lists most surviving wills, so the chances of finding a copy are very slim. (I checked the PRONI name search too.)
Here are a few random marriage snippets I came across. I think the first one could refer to Clements BELL and Jane HERON who later settled in Ballyearl.
Belfast Newsletter, 7th Mar 1828:
On the 4th inst. by the Rev. Joseph McKee, Mr. CLEMENTS BELL, Merchant, Belfast, to JANE, relict of the late Mr. David Drennan, Killealy, Killead.
Belfast Newsletter, 20th Jun 1895:
BELL-PATTON – June 18, at First Larne Presbyterian Church, by the Rev. J. L. Donaghy, Clements, eldest son of the late Alexander Bell, Carntall, Carnmoney, to Annie, eldest surviving daughter of William Patton, Larne.
Belfast Newsletter, 15th Jun 1901:
BELL-FRETHEY – June 4, 1901, at the Parish Church, Cairncastle, by the Rev. Greene, Clements Bell, Larne, to Mary Elizabeth, eldest daughter of James Frethey, Esq., Newton Abbot, Devon.