If this helps,I had a friend with a grey EX55. He got parts from a local Hitachi dealer. He was lucky because there was a US model that was the same. Yanmar grey parts for same US model are easy, I have had one. Kobelco are a little tougher. You have to " borrow" a US serial number from a like US model and then they are no trouble. My grey experience has been mostly positive so far.