I'm responding to provide a couple of ideas but also to bump your post back up.
There is something called Handwriting Without Tears that you could google and read about. (I havent' used them personally and don't work for them : 0 but it might be worth looking into) and any homeschooling sites that suggest handwriting programs.
My DD9 was similar in the advanced development but strong resistance to handwriting. She is still behind her peers (she's had some vision and fine motor issues for years) but at that age I wasnt' too concerned because in the past kids started this sort of thing much later so I thought developmentally she wasn't ready.
There are things you could do like having him write with finger paints, write in sand, my DD used to like to dip a stick in water and write letters and words on the driveway. She did letters and words backwards (including letters/words from her wooden blocks were "mirror images") but again at that age this still could be "normal" that's what people would tell me.
You could try those ideas and also make sure he plays with clay and play-dough and beads and things to work on his fine motor skills. Maybe an Etch-a-Sketch?
Is there anyone he could Skype with - friends from your previous place, grandparents or cousins? For the give-and-take of conversation, a little "show and tell" for him to do?
