Just use a 906 flasher bulb -- they have the same base (T10). If you don't have them, you can easily find them for car applications. E.g.:
https://www.aliexpress.com/item/Hot-Sale-External-Lights-10x-Error-Free-T10-Canbus-Led-w5w-194-5630-5730-6Smd-Light/2001686694.html
https://www.aliexpress.com/item/10pcs-T10-COB-LED-Car-Interior-Wedge-Lamps-Instrument-Bulb-W5W-WY5W-192-Auto-Parking-Lights/32807454479.html
Super-Bright-10-X-T10-led-W5W-T10-6smd-canbus-5630-led-Canbus-NO-ERROR-Car.jpg_640x640 (resized).jpg
10pcs-T10-COB-LED-Car-Interior-Wedge-Lamps-Instrument-Bulb-W5W-WY5W-192-Auto-Parking-Lights.jpg_640x640 (resized).jpg