Wow Mike, you've really had your share of problems with this stand! I feel somewhat responsible, but also know several folks who ordered the same stands, including myself, and everything went smooth as silk. I had problems once with Richard's email address too, but the one I have now is beemerrich_49503@hotmail.com, which is slightly different than his older one. No phone #, sorry.
I just pulled out my original BMW mounting bolt and measured it, and it comes in at exactly 12".
I'm not sure why yours would need a bolt 13 1/4" long, but unless someone else here steps up with a solution, try your local Ace Hardware, which has lots of stuff the big-box retailers don't stock.
Also, you may want to try Southern Fasteners,
http://www.southernfasteners.com/index.htm , or Automotive Fasteners,
http://www.automotivefasteners.com .
Good luck, and please keep us posted. [smiley=thumbsup.gif]