The server is owned by a Dallas-based hosting company, which has nothing more to do with the actual people running the "shop". The domain name was registered through an Indonesian domain name reseller. Beyond that, the trail goes cold.

Also, both the HQ address and the warehouse address on the web site appear to be fake. They are superficially correct, but there's no Jalan Patimura or Jalan Angsa Patimura either in Banten or in Bogor. There's no zip code 16501 in Indonesia. Also, "Jalan Angsa Patimura" is a nonsensical combination of words roughly equivalent to "Maple Lincoln Avenue" (there are many streets in Indonesia called "Jalan Angsa" - "Swan Street", and there are many streets called "Jalan Pattimura" after a national hero, but the only hits for "Angsa Patimura" in Google lead straight back to idmasterbikes.com.)