Hey Ed,It appears there is a pattern in this paticular example that you may be able to use.
It seems the main graphic has the same name as the page name:
descpageRCDUNLOP-MF200P.html
-and-
MF200P.jpeg
Note that the data after the hyphen for the page name is the same as the graphic name.
I only checked this on 3 or 4 pages, but it held true each time. You'll need to check it some more.
If this holds up, you should be able to use the Tuelz to manipulate the data so that you can get the graphic URL using the page URL.
But don't spend 5x as much time and effort trying to find a work-around that it would take to do "by hand".