The Showgard #41 black mounts work well but only come in strips of 215 mm.
Below are a couple of options using the Showgard mounts. The first option is to cut the 215mm strips in half. While it is the least amount of waste on the mounts it does not cover the images.
The other option is to cut 120mm long leaving an 95mm drop. Looks very nice though.
Anyways, just sharing what I have fund for stamp mounts thus far. Please feel free to share other suggestions. I'm still mulling around ideas on the FDC album pages too.
Oups - I just noticed the bottom right image is peaking out.
Dave Gill
RILP - PMG
I've had great luck with Lighthouse 41 mm mounts clear. They are a hingeless style mount with an open top, so you can mount the strip first, and then slide the stamps right in from top. With the pages in page protectors, the stamps stay in-place really well..
I suggest using clear Showgard mounts for a better visual appearance, allowing you to see the stamp outline on the album page. the clear mounts are almost invisible.
Dave --
I think my preference would be to use the 140mm length (or maybe a bit longer, since the rest would basically be waste) to cover the bottom lines of the two outside triangles on the album page, and then cut the two sides to match the angle of the stamps. You would wind up with a nice 4-sided trapezoid that would match the configuration of the three stamps.