DX got their modules back in stock
All green lasers typically have around 1-2mm diameter beam at aperture. The diameter at further distances varies with the quality of the laser.
There was another post about this less than 2 weeks ago, try a search for it..... I found a link to a small diameter one and posted it there but TBH I am not going searching again..... a hint, look at page 2 of the green forum