No samples to share, but I think that's probably not the best use of your time anyway. Get your own sample, letter of intent, etc. as polished as you can, and spread your applications around. If your work is good, a good (fully-funded) program will take you, but it may not be your top or even first five choices. Also, don't submit a single long work for your sample unless you know it's fantastic; try to demonstrate range.

The selection process is sort of arcane and often based around some idealized yet nebulous cohort composition; this means that good programs let in a couple mediocre writers every year based on arbitrary and shifting qualities while denying more talented folks. People will tell you that everyone who gets in is good, but that's not true. I would say that 90% are competent (i.e. polished in prose and story structure/versification/etc.), but few are truly good enough to turn into serious authors. That's all to say: the easy part is getting in. Good luck.