Look in any police supply catalog, or online retail store. They will still have losts of maglite stuff. I carried a C cell in a ring loop for years and it worked well.
I'd get the anti-roll ring (usually sold with the colored filters, but I've found them being sold separately). I've got 2 2-D LED MagLites that I use around-the-house so equipped, and they have been useful when doing repair work.