Don't really have a local provider. DS was diagnosed shortly after he was born and we got a nebulizer and a neb cup from the hospital (apria) before we left. I contacted the DME provider affiliated with out clinic when we got home and pretty much got a response simlar to ktsmom "we don't carry that brand (pari)", should you need any equipment, etc. you'll have to have your doctor call in a prescription, ditto if any work needs to be done on the machine.
I ordered a spare devillbiss pulmoaid online for less than $100 and when something went wrong with it, I did take it to the local DME provider and was told they don't carry that brand, they could rent us a spare and they'd have to send it in. They sent it in, was still under warranty and I got a replacement three weeks later (could've done that myself).
So locally, we're kinda left in the lurch. Nobody's really ever been able to tell us where we should go to get medical equipment, etc. I get some spare neb cups at the local cf clinic from the rt department when DS goes in for sputum cultures, otherwise, I order online. Ditto with compressors. Our first Pari that we got from the hospital -- insurance was billed over $350 for a machine that we can find online for less than $50.