Brandeis has a variety of parliamentary papers available on microfilm.
For example, for the 1790s, we have The Parliamentary History of England from the Earliest Period to the Year 1803, covering 1743-1801.
There are also options for viewing digitized Parliamentary Papers. A digital edition of Cobbett's Parliamentary history of England (1066 to 1803) is available through the BPL database Making of the Modern World. Cobbett's Parliamentary History of England is also available through Oxford Digital Library. (The full text searching options might be better in the Making of the Modern World database from the BPL though.)
British History Online also has:
This page includes suggestions for many digitized collections of primary source materials, but remember to consider sources that may not have been digitized. Try searching theLibrary Catalog. Search by an author from the time period or enter a subject in combination with any of the subject headings used to define primary sources:
The Boston Public Library has a number of excellent databases withe primary source materials, including:
You can sign up for a BPL ecard which will allow you to use these databases.