price difference of replacement ring

A)$379  for this ring with a 1.5ct(7.5mm) GHI color moissanite in 14k white gold. Size 5-------price difference 237.56($379-$105.44)


B) Client need the band be thinner. 1.5mm band thickness and 1.5mm band width

C) Client needs to return the original silver ring before we send out the new replacement