Ballon gas / helium valve info needed

[Spare tyre]

I have the bottle pictured below, someone I knew got it for me, no questions asked scenario

I'd like to be able to fill some balloons for a kids party using it

Can anyone in the know point me in the right direction, perhaps on eBay or something similar

I went to boc but the amount they wanted was out of my league

Any help much appreciated

[dudleybloke]

http://ebay.co.uk/itm/291766414524