have you tryed contacting some of the makers like my hub has apria so he has to go threw them for new mask .. paying of corse 130$ for a mask . I have seen the type you are speaking of the hose just connecting into nose.
on the link I posted it shows that type. I would call or email some companies and tell them of your situation, also that doc should be helping you if he thinks it is importion and a healh issue he should be looking for/along with you!
I will keep my eyes looking for that type and any info I get will come your way, promise! I am going to see if the comp. dh deals with has any like that.

Peace
BMW