I was browsing Top Tropicals website last night and very surprisingly found Maha Chanok for sale finally after it has been shown as backordered on this webiste for years. I've never ordered from Top before and have heard many negative comments about them, but after much debating, I ordered one today and the total including shipping to CA is $128. It is cheaper than Plantogram whose price is around $155 after shipping.
I am keeping my fingers crossed and hopefully I will get the real Maha Chanok soon, not just some mislabeled mango tree. I will post a pix once I get the tree, and hopefully the mango gurus here could help me prove it's identity.