There is no longer a link to the game code store from the official UO website in English. There is no information on the UO Japan site that mentions losing the game code store in Japanese that you cannot access from an IP outside Japan.
Only eleven UO-related items seem to be available in the English version of the Origin.com store: Advanced Character token; Character Transfer token; Legacy Token; 7th Character Slot code; 7th Character Slot and Additional Storage code; SA Upgrade; Rustic Theme Pack; Captain's Bundle; 3-Month Game Time code; 6-Month Game Time code; the High Seas booster (have to search for it by name); Forged Metal Tool (10 charges) (search by name).
UO-related codes/items you currently cannot purchase directly from EA include the following (going from memory here and picking through the Japanese UO site, so probably missing a few):
Grand Bazaar Pack (includes both the Rustic and Gothic Theme Packs)
Gothic Theme Pack
Name Change Token
Gender Change Token
Additional Storage Code
Smuggler's Edge
Merchant's Trinkets (90-day and 30-day versions)
Undertaker's Staff
Haochi's Pigments
Pen of Wisdom
Teleporter Pads
Carpenter's Workbench
Hitching Post
Fallen Log
Earrings of Protection
Filled Bookcase
Armor Engraving Tool
Round Lamp Post
Ancestral Gravestone
Snow-Covered, Maple, and Willow Trees
BOD Book Covers
Natural Hair Dyes
Small Rugs
Ladybug Lamps (might have only been available thru the Japanese store, can't remember)
Maybe someone should send our illustrious producer a tweet and ask him what's going on.