The following gives you some ways of obtaining Wills of Forest of Dean people.

You can search the Gloucestershire Archives for Wills proved at Gloucester from 1541 to 1858.
http://ww3.gloucestershire.gov.uk/genealogy/Search.aspx

If you find a Will of interest, it can be ordered from the Glos Archives, contact details are on the following web page.
http://www.gloucestershire.gov.uk/contactthearchives

Gloucestershire Archives also hold copies of 83 Volumes, containing 42,000 Wills proved in the Gloucester Probate Court between 1858-1941. Approximately 7,000 of these Wills relate to Forest of Dean people. Unfortunately, they do not have these Wills indexed or have a process for producing and sending out copies of these Wills.

David Drinkwater is progressively indexing the Forest of Dean 1858-1941 Wills and Admons, this index is available on our Web site on the Wills Index page.
http://www.forest-of-dean.net/?Wills_Index

Although, you cannot order these Wills direct from Gloucestershire Archives there are details on the bottom of our Wills Index page of how you can possibly obtain a copy of one of these Wills.