Need Help Finding Fasteners

[cericd]

I'm looking for a couple of specific fasteners but can only find them from one supplier. I'd prefer to order them somewhere else because what I need doesn't meet their minimum order. The site I found them on is www.amkproducts.com

The two screws I'm looking for are:

#8 X 3/8 HXWA AB Black Phosphate


#10 X 3/8 HXWA Black Phosphate


I'm not concerned with the markings on the heads of the screws. I just don't want them to be combo fasteners. Like, hex head with a slot or hex with a Phillips. Just looking for hex/washer head only.

I looked on McMaster Carr's site but couldn't find anything. Maybe I'm just not using the right search terms. Would be nice if McMaster had them because there's another fastener I plan to order and it would be good to combine shipping costs.

Also, tried the regular local places Home Depot, Ace, Lowes, etc. No luck finding black phosphate fasteners of the correct type.