The Jordan size 48 + 4 is legit as it's a pro cut Made in the USA, not worn.
Here's a a link to an actual game jersey with that size:
The Jordan All Star is neither game issued nor worn, it's simply a 'pro cut' because it has additional length, and is not a traditional retail authentic. Neither jersey is advertised as game worn to my knowledge.
As far as Unique Threads go, jerseys4thewin will be selling the same jerseys very soon because someone had a huge lot of pro cuts and sold in bulk to those guys.