Sue. I ordered wills post 1910 in Aug. 2003, and the prices then were three pounds fifty for each extraction and copy, plus postage. The officer who was dealing with my query stated that they have readily available records at their office from 1940 to the present date, and can obtain earlier records dating back to 1911 and earlier. They request that you forward the names you wish to enquire about and approximate times of their death and they can then check their records via computer or in older indices.
I am quite sure if you sent them a query and they were unable to fulfil your request they would certainly point you in the right direction.