best bet is to throw your tank in the van find a local hose or hydrolaic place and go and pester them , you will get what you need right away , you can go and try stuff out in the van if you unsure and if its a small place the lads will help you out big time
, it will be mostly metal either s/steel or brass and will out last you and your van so you will never need to buy them again , just take them from van to van