Yes, Pitroad has a website and one retail outlet called "North Port". For international mail-order sales they point you at Amazon Japan and Yahoo Japan.
Here is their website (Japanese but some great pictures): http://pit-road.jp
They have a somewhat outdated product list in English: http://pit-road.jp/?p=12272
Their web page saying to use Amazon and Yahoo for mail-order: http://pit-road.jp/?page_id=35
Pitroad has a preference for selling via hobby shops and online distributors. You can buy via some of the SteelNavy sponsors and from Amazon Japan (and pay a high, but not outrageous, shipping cost for 2-3 day shipping to U.S.):