Need some sourcing advice for parts

I'm in the process of building an RGB show and so far I've picked up selective reflecting mirrors from olike along with lens holders however I'm not thrilled with the size and the complete lack of adjustment. I'd really appreciate anyone who could point me towards a good reliable source for a nice large window (1" - 1.5") reflective mirror for blue and red along with some solid aluminum adjustable mounts for those lenses.
I think there might even be a better way to do this rather than these mirrors, such as knife's edge (?) to join the colors? but I'm still reading about those.
tia

Those selective mirrors are commonly called 'dicrho's', and are the best way to combine lasers of different colors into a single beam.

The adjustable mounts are often sold seperately and are know as 3 or 5 axes mounts, depending on the number of adjustments available. Typically the fit a 25mm/1" dichro or mirror, and cost in the order of $30-$40 each.

Thank you, I'll finally be able to get this beast up and running. I'll be posting pictures of my build as soon as I get it running.