First, determine the part number of the part that you want. Then call Clausing @ 1-800-323-0972 first and see whether they still have one in stock. For the particular part that you need, probably not but ask first. If they don't still carry it, they will usually send you a copy of the original drawing as either a PDF or if you specifically ask as a .TIF which is how they store it. I don't recall having done it, but you might also check Downloads on this site. If I did download it, I usually would have cleaned up the file before converting it to .PDF and uploading it.
If it isn't already in Downloads, send me a copy of it preferably as a .TIF and I will clean it up and add it to Downloads.