Japanese 390 Store Adds MLP Stores to Collection

The 390 store, a.k.a. Thank You Mart, in Japan has expanded their exclusive line of 390 yen My Little Pony items with t-shirts in various colors and designs. They have at least 24 design and color variations planned with both G1 and G4 prints on them. Converted to dollars these shirts are only $3.50 each, which is ridiculously cheap for a licensed shirt.
You can see their full line-up of My Little Pony items over at Rakuten, where you should be able to order the items from outside of Japan. Do note that sizes up to XL are available at Thank You Mart, but at this moment the online listings do not offer a size selection.
Thanks to Ayu for the info!