Brown Olive for 68 is bang on! Black Crock for 65.
Is there any good internet retailer that ships world wide that have a verly large Strap wharehouse, where you could find Tropic in rubber, your Brown Olive, a few different NATOs and other possibilities.
I also think the AMVOXII and AMVOXIII (divers strap) would look very good on 68, have you tried?
Best,
Christoffer