Ace has never had a website. It's always just been their Facebook, Instagram, and a direct link to buy them on SoCal.
The "3/8 specials" were announced about a week ago that they're now fully available. Some shops were posting photos way before that announcement of new Ace trucks back in stock, and they'd have the 3/8 nuts on the axle. I contacted a couple shops and they said they came stock that way. However, Joey says the nuts will be sold separately.