As I tell the Atlas people, if someone needs a part and if it isn't fairly readily available on the used market (eBay, etc.), the steps are:
1. Look up the Clausing part number in a parts manual. There are a few of them in the Clausing section of our Downloads. So Step 0 might be:
0. Find a parts manual.
2. Call Clausing @ 800-323-0972, ask for old Clausing parts, and then ask whether or not they have any of the parts. If they do, either buy it or don't, but don't waste time asking for the drawing. If they don't, ask them to email you a PDF (or TIF if you can handle it) of the drawing or drawings. When you get it or them, upload to the Clausing Drawings folder in the Clausing section of our Downloads.
3. Make the part(s).