A bucket is easy enough.. I know a Saz or M-DSB would work, and both take helmet plans. If you're smaller or larger built, the M-DSB would be better, as they offer sizes. Saz is working on a smaller 2 piece based size, but I don't think it's done yet. Both of them take helmet plans too. If you're TINY tiny, liek little kid or very petite girl size, Jare Hasaan makes a vac-formed mando bucket.
flightsuit.. There are several seamstress and sewer types.. Mar'eyce and drago543(I think that's his name) come to mind as the two doing the most sales. I've had experience with Mar, but not the other, so I can only recommend her. There's probably vendors on both outside of mercs, but I always suggest supporting the club and it's prop makers first and foremost.
And I can't wait to troop next to this kit again, hopefully for more than 15-20 mins this time Kal'buir!