Ugh! I wish I didn't run into this thread. I liked that Seiko so much with the custom band that I started doing my research. Found the model I wanted, the SNZG15J1 - different than the SNZG15 (being offered through Groupon) because it is made in Japan.
Purchased said SNZG15J1 from a Japanese retailer ($120):
and added this Hadley Roma band - MS84622mm Hadley-Roma Brown Oil Leather Pinhole ($29.87):
Total cost $150. Not a bad deal..but a far cry from the $65 + potential $17 strap that started this eager search.
Carry on gents.
I have this one too and wear it a lot. After much changing straps in the beginning, I now have it on the stock strap. It wears very well, nice and soft.