Who would have thought that finding the foster disconnect in high enough PSI would be the problem? Yikes! However a couple of the harder to find parts that I managed to find are here:
6000 PSI bleed valve http://aeroconsystems.com/cart/products/Model_712_6000_PSI_Bleed_Valves-197-0.html
SCBA fill adapter fitting http://aeroconsystems.com/cart/products/Model_835_SCBA_Fill_Adaptors-200-55.html
High pressure micro bore hose http://www.ralstoninst.com/hoses/custom/2M2M-HOS-3ft
(manufacturer so you need to find a distributor)
I'm also curious as to what's the difference between these the female disconnect on Joe's site and the one at Pyramid (the disconnect looks like this: http://www.pyramydair.com/s/a/Female_Quick_Disconnect_Male_or_Female_1_8_BSPP_Threads/2989
Wow, spending a couple of days on this has really given me an appreciation for the amount of work the guy put into finding all the piece/parts to put together his hose assemblies, talk about a lot of virtual leg-work!! Note, I'm not trying to clone his adapter, I just like the micro-bore hoses because you waste less air that way.