Did some googeling for dimensions, Amazon has the simplest and easiest to find dimensions if they offer that bearing for sale..
EDIT here's a good link for finding bearing dimensions by part number, use the PDF search/find function (Ctrl + F)
http://www.baumhydraulics.com/files/catalog/sec-r.pdfI'll see if I can get a real copy of that catalog to thumb through.
To clarify the confusion a:
Timken SET45 = Federal Mogul A-35 = CR (Chicago Rawhide?) BR35 (the one NAPA told me).
As found in the back page Steve found on the above linked PDF.
And to answer the question, the components of that SET45 (inner wheel bearing that fits hub but not spindle) are indeed LM501349 and LM501310 for the cone and cup respectively.
On first attempt I could not find a different cone with 1.688" bore and to match the LM501310 cup.
I'll look some more.
Thanks,
Grigg