75mm, the one I have measured, came out to (approximately) 56mm distance for square die focus, but that was with an XM-L. Yes, I’m putting a 75mm aspheric in this, from wellparts (ebay).
I don't think the website shows everything the local stores have. Some people said they carried the Ampro 3AA light (here at Amazon) but I never found it at the store or online.
I don’t have a part number. It’s in most stores, but not all stores and it does not show on the website. I have found that type of thing before with TS. If I get by there soon, I will get the part number, if they have any.
I can tell you it's 100 led and takes a 4AA battery holder.