Hi Helen,
If St Thomasis is definately not their final resting place you need to look arround.
Have you thought of Public graves atr St Thomas's, you would need to contact the churchwardens to find out more, trhere is a charge for searching the records, currently about £20.
Have you thought of slightly farther away, St Michael's Mytholmroyd and St James Hebden Bridge.
Failing that, what about non conformist graveyards, these were usually cheaper to buy a plot and were popular even with Cof E worshipers, as my family have proved, they worshiped at St Bartholomew's Ripponden but were buried at Rishworth Roadside Baptist Chapel.
They died in the town where they lived so i cannot see them being buried too far away.
Regards,
Andy