RV Partfinder opening screen. This is the first page you see when RV Partfinder starts up, from here you can conveniently perform 4 different searches. Quickly search for parts by entering a Distributor's catalog number in the left-hand box. Alternatively, you can search for a part by description; simply use the second box. Manufactures part number is probably the most common method. To do this, simply enter the number in the third box. RV Partfinder is Barcode compatible, so one of the easiest method is to use a Barcode Reader in the right-hand box.