Bristol Archives have an index to wills proved in Bristol between 1781 – 1858. There is a good general explanation of what you are likely to find in a will, a couple of examples of wills and the index itself.
Once you have found a will in the index that you would like a copy of you can then email the archives and they will send you back a quote. Sadly they don’t accept credit card payment, so I assume they will accept cheques or bank transfers perhaps even debit cards.
The index gives name, parish, occupation & the year the will was proved. Enough to identify if the will is of interest to you.