Need DIY SCBA fill hose HELP

So my department recently decided to get rid of some stuff from storage. I have obtained an older SCBA that is still a functional unit, but I believe it has all the parts I need to make a fill hose. The steel tank still has three years left on the hydro. Here are a few pictures. I am wanting to put the female foster 12fs on the end of the 90. That's the part the manual calls for anyways. I will be using it on a Crossman challenger. I have never fired the gun. it was inherited new in box, but didn't come with anyway to fill it which is why its never been fired. Here are the photo's.... hopefully from the photos we can figure out what part/s I need to buy to get this functional. For what its worth I trust everything to be in safe working condition on this air pack.

EDITED TO ADD: Not sure why the IMG link off photobucket did not work. 





 
I understand what you are saying, but I believe I am good to go. This is 100% SCBA. I wore it just the other day on a training to show that the old stuff still worked. the tank IS 2216, but the bottle itself is rated to 2500 on the bottle pressure gauge alone. I also have access to at least 30 of these bottles if I get them hydroed. My Crossman has a max pressure of 2000 psi, so using the cascade method of filling them I will be able to get plenty of use out of these. I also only have to drive two miles down the road to fill them myself at the station so there really is no inconvenience of having the lower pressure bottles.

Now, back to the question, what do I need to adapt this to fit the correct foster connection?
 
3000 psi scuba valve to replace the one currently on, 
http://www.ebay.com/itm/MAXDIVE-Scuba-Tank-Valve-Scuba-Diving-Valve-3000psi-DIN-Yoke-3-4-14NPSM-PRO-1-/111978607447?hash=item1a1271f357:g:vXoAAOSw-RRXCQOh

http://www.ebay.com/itm/Paintball-PCP-HPA-Scuba-Tank-Air-Din-Fill-Station-300bar-4500psi-20-Hose-G5-8-/172411008928?hash=item28247f37a0:g:ChcAAOSwXeJYLIa4


Cheap for pcp use, 60 american dinars. That will save you of a lot of headache. but if you want yo use your current parts I would recommend to start disassemble it and grab some measurements and see what you can use and what you need.


my phone loves autocorrect.