I used AMK a lot for correct fasteners on my restoration, and they are great, when you have a part # to refer to. The only problem with AMK is they have a $30 minimum policy. I used to make up a list, when I got around $30 I would place an order. I have their catalog, and I did not see these bolts as a separate item.
I have never once, ever, flicked through their catalog and spent less than $30 in the 10-15 orders I've placed with them in the last 10 years..
Yesterday I spent $270 plus postage to down here. They have too much great stuff !
Mind you, I have a fastener fetish and more than several tackle boxes full of "stock"..