I highly doubt it ! Maybe go to a wrecking yard and see if you can get the parts off another one to replace whatever is broken on yours , or see if they have a whole door assembly . It's quite a job though ! Good luck !
Absolutely not, in fact you may just make their day by laughing at you as hard as they can. The door was designed to keep passengers in the vehicle should it roll over,since it's ready to fall off this feature has been all but been lost and the vehicle cannot be deemed safe by any means.
If you duct tape it, that will not help it. At all! Duct tape is meant for other purposes, not for taping on cars! If you do decide to use the duct tape anyway, then you will have a very unstable passenger door, and you won't be able to use it. (If you did, it would fall off, obviously.) And it also becomes hazardous, because if you're on the freeway/highway,and you go at high speeds, the door will come off. Now, would you rather just get a new door, or would you want to possibly take someones life away? Think about that.. I think I know the answer..