Have a look at the Four Winns website at
http://www.fourwinns.com/ Click on the "Customer Service" link near the top in faint gray letters. On the Customer Service page (
http://www.fourwinns.com/customer-service.aspx ) Have a look at the "Catalogs", the "Browse the Parts Catalog", and the "Owners Manual" links on the right side of the page. The 1995 model is not shown in the Parts Catalog, but the 1996 model is. The "Catalogs" link has a "Fast Facts" section that gives specifications for the model year you select, including 1995 models. There is an Owners Manual for the 1994-2000 238-258-278 Vista models.
The Parts Catalog does not include every part, but it does cover a lot. You can also occasionally find a vendor's part number included in the part description.
The gas shock struts used for holding car hoods and other lids open normally have a label or part numbers stamped into the barrel. The part number includes a length and a pressure or force rating.