[Sentinel]

I am now in need of a replacement for my Howie Glatter Laser Collimator end piece (1mm aperture stop), as it is very loose and will come out, one of these days. I do not wish to lose it or have it bounce onto my primary mirror. I have posted the one I have as image attachments.

I believe there is now a replacement. Has anyone seen one, or can post an image of one for me?

Also, is anyone using a tuBlug?

Thanks