Northshorecompressor.com
They'll have everything you need under the paintball section.
Although, the lines they sell are 1/4" so, you'll lose more air during bleeding than if you were to get micro bore hose.
CGA 347 is the SCBA fitting.
Shoot me a PM if you end up going with their high pressure lines. I upgraded to micro bore and would be happy to help you try to keep your cost down.
Tom