I have 3 1168 grafmatics (for a Graflex back such as on an RB series camera) and 4 1268 grafmatics for graflok backs that are surplus to my needs. All are light tight (checked this week with paper), and all cycle through reasonably. I can't say which, if any, I've used but all should be fine. All are in fairly good shape or better, and all have straight septums (at most, one or two might need to have the small tip by the notch straightened a bit). $100 each for the 1168s and $75 each for the 1268s, plus shipping from NJ. I can provide detailed photos for you as needed.
These weigh just over a pound each. USPS priority mail (the only way to get insurance and tracking) would be around $40 for one and $48 for two. That's US$