Holy Trinity Shafetesbury records - ORPIN or ORPEN

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I'm looking for the burials of Robert Orpin/Orpen, his wife Jane/Joane/Jone and daughters Jane, Anne, Mary and Martha.  One of the daughters had a daughter Judith Courtenay so may have been married to Courtenay.  They all died, as far as their brothers who had left Shaftesbury recorded, in a plague outbreak in November and December 1645. 

Holy Trinity parish is the parish referred to in Robert Orpin's Will and Probate.

The transcribed records for Holy Trinity on the Dorset OPC start later than this.  The OPC for Shaftesbury says the earlier records are at the Dorset History Centre but in poor condition.  Is it possible if someone was going there anyway, they could see if there is any mention?

Thanks
Isabel