Here ya go, Reg. These are for the access door where the thumbscrews are in the bottom and the oil access door hinges up:

http://www.cessnapartsdealer.com/xcart/product.php?productid=32888

http://www.cessnapartsdealer.com/xcart/search.php?mode=search&page=1

And here are the cowl fasteners themselves:

http://store.wagaero.com/product_info.php?products_id=3404

Bill
Grants Pass, Oregon