I would focus less on the mouthpiece and more on your playing. A couple weeks is not enough time to get used to any mouthpiece, regardless of what it is. I don't really understand why you would literally have to throw away a mouthpiece, but my suggestion is to find a nice bach 3c and do some buzzing and long tones. Arbans always helps as well. +1 for the skype offer, that's a very nice thing you've been offered.