Thanks to all for the replies you posted and suggestions!
Sixpointone--I sent an email to John inquiring about the pouches he makes. It sounds like excellent quality and craftsmanship! Although to be honest I'm not sure that I'm willing to wait to have one customer made.
Yaesumofo--The Concealco holsters offer an interesting option. Personally I'm not sure I like the leather look (I'm more interested in a cordura or nylon type of holster). But I know that others would rather have a leather holster than a fabric one. It's all a matter of personal opinion and taste. Thanks for the post and link!
Valpo Hawkeye and Powernoodle--I've seen other posts (including the ones on this older CPF discussion about holsters:
https://www.candlepowerforums.com/threads/95228) that a holster designed for the Streamlight Jr. Luxeon is just right for the SF L4. There are different ones out there (for the SL Jr. Luxeon), so I'm not sure even which one of those would work the best.
Then I found this website:
http://www.holster-depot.com/shoppro/toolfind.html
Talk about flashlight holster choices!!
They list a model CO-124 for the L4:
http://www.holster-depot.com/shoppro/tools9.html#co124
It is available either with a standard closed belt loop or with the clip-on belt loop. I rather like the looks of the clip-on one.
MattK--the Maxpedition holster looks well-made, too. They have some decent color options, but they only come with closed belt loop. Most Flashaholics probably wear their flashlights on their belt all day (maybe some all night, too...LOL) but I like the idea of a holster that can be put on or taken off without having to remove my belt!
Danbo--Grasshopper, you say?? This is Flashlike, not Grasshopper. No worries, though. All of us here like flashlights and that's what really counts!