Screw-in light bulbs - very tiny

I have a lamp with 5 clear screw-in lights, 3 of which need replacing. I have tried to get replacements through a couple of suppliers, but they say they don't do them any more. Someone suggested the bulbs used in model railways.
The information I have is:
Pre Lit Twist Lamp with 5 clear lights, Bulb 12v 0.84w Catalogue No. RL 1208C.
Can anyone help with alternative replacements? It's a nice lamp and I'm reluctant to replace it if I can get the light bulbs.

I'd appreciate your help.

Maybe it can be re-wired to use LEDs or something that's available.

There used to be lots of kinds of tiny light bulbs but most are probably out of production since LED's took over the world...

Do they have a metal base that has a number stamped in the metal? Can you take a picture and post it. I, along with many others, have a box full of misc. old bulbs, and one may match.

Might be time to upgrade.

Did you Google grain of wheat or grain of rice bulb ?

Just Google RL 1208C and you will have +16000 hits

Really? Did you actually try that? I don't see many actual lightbulbs with that designation in the results.

I have a lamp with ... [very tiny bulbs]
The information I have is:
Pre Lit Twist Lamp with 5 clear lights, Bulb 12v 0.84w Catalogue No. RL 1208C.

Can you be more specific about "very tiny"? Dimensions and/or a photo, perhaps?
0.84W sounds very low for a "lamp." I did find some "1280a" 8W bulbs: 01280 - Miniature / Automotive Light Bulb | LightBulbs.com , but they're not what I would call "very tiny."

This sounds like something from an old string of Christmas tree lights where, for 240 volts, 20 would be in series.

Not in all cases. I have an alarm clock (near current model) with radio time synchronisation (DCF77) and an analog display. It is powered by a single AA (1.5v) battery. To illuminate the dial there is a simple filament bulb, a bead with two projecting wires. I don't think the led technology is quite there yet to replace it without at least a few additional components.

Have you tried searching for
Dolls house light

I got some last year for my wife's dolls house display. There seem to be several lengths of screw thread with these sort of thing.