from ebay

many seller, $1 for 10 seller,

https://www.ebay.com/sch/i.html?_from=R40&_trksid=m570.l1313&_nkw=T5+cob+led&_sacat=0&LH_TitleDesc=0&_osacat=0&_odkw=T4+cob+led&LH_TitleDesc=0

i find some information this seller:

https://www.ebay.com/itm/4PC-T4-Neo-Wedge-Climate-Base-LED-Cluster-Instrument-Dash-Bulb-Lamp-Lights-White-/391990242236?vxp=mtr&hash=item5b44706bbc

Specification
Base: T4
LED Per Bulb: 1 SMD
Power: 0.5W
Lumen: 20LM
Milliampere: 50MA
Voltage: DC 12V
Color: White
Size: 12mm*10mm
Features:
Each T4 Light Cover comes with Super Bright LED bulbs
High Quality 12v LED Warning Dashboard Light
Eery easy to install it
Will work on all systems that use a 12v power source
Replacing instrument cluster panel, A/C Lights, Dashboard Gauge, Climate Control light bulbs.
Low power consumption, long life time.
Package included:
 

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thanks