Orient Mako Mark 1 you say...
Sadly all gone now. A word of warning, people get excited about the Mark 2 going on about the hacking and the ability to wind etc, but the crowns are absolute crap and people have had problems with them. The crowns on the Mark 1 are superb, never had any issues.
If you hunt around on Google you can still pick up brand new Mark 1's. e-bay is also a good hunting ground. Never bought one from Chrono 24 personally. Amazon is also a good place to look.
I used to just google Orient main dealers, then enter Mako. Most are in the Far East. The site below in Germany currently have three of the five brand new for €144 each and there are no import charges as they are in the EU. They also sell the bracelets seperately, but you could buy a nice little bundle from that site.
https://www.orientuhren.de/index.php...8e5c3c1b06c2e8
Another caution. Those diver straps will have 2.00mm wide spring bars and the bracelets only take a 1.50mm, so if you bought some bracelets you would also need to buy some slimmer spring bars. Tons on e-bay.
Hope this is helpful