Jax, the Purple Pear is in Monsey. Unless there is another branch I don’t know of? But no, I have not tried them and they sound yummy. Way to tempt a pregnant woman when she has no chance of getting there!
Sammy’s Bagels is still around. The business was sold twice (I think) since the original owner. I don’t know about the challah though.
My all time favorite challah is water challah from Gideon’s Bakery (Gruenebaum’s in Washington Heights). I don’t think they are still open though. They also had awesome black and white cookies.