Looking for budget holster for S21A with battery pocket

As title says.
Reviews on AE says that holster for S2+ is to small, for s11 is too big.

Convoy makes holsters for their lights. Nice and cheap.

I know. But none of them fits S21A.

Hi, did you find a holster for S21A? Thanks!

The “small” size holster Sofirn sells is well-suited to 21700 lights, more than 18650 lights.

I use it with their SP35 (126 x 25.5 body x 28mm head), which I hard time finding a holster for from elsewhere. It’s snug, but not too tight.

After not finding anything promising enough from Ali, I first tried a couple from Amazon — a T309, which was really just a longer version of the typical 18650-sized holster, and too tight in diameter. It fit, but not without a fair amount of stretching.

Also tried a T307, which was labeled properly, but in build (plastic, not metal ring) and measure was actually a T310; too large in every dimension. A true T307 as described might have worked, but despite the empirical evidence provided, they insisted they sent a T307, or what is sold as a new design T307 now, which then doesn’t match the item description, so I gave up on them.

(I didn’t originally order the Sofirn holster with the light because I got the light from the Amazon store, which doesn’t carry accesories. Ordering the holster alone from the direct or Ali store wouldn’t have been worthwhile, so it had to wait I could make it a part of another larger order. But in the interim, the other options were explored.)

Unfortunately, there is no real, consistent sizing system with these things, so it requires some trial, error, and hope that what arrives is actually desired and suitable. That inconsistency and nebulousness also extends to the item descriptions, which doesn’t help.

I have 2 x S21A with holsters although they were demoted to flea trap lights long time ago. Just double checked and it fits well, with velcro maybe coming up a touch short but still enough overlap to keep holster closed firmly.
It is Convoy holster for S2+. It also has a battery pocket but if you keep battery in single plastic case it will have to stretch a bit.

THKS! INTRUDER, SIDA