LED Converter, Slim line & dimmable

​Hi,

since three weeks I am serching a converter with specia requirements, 
did´nt find yet anything that fits:

max. size: ​ 35 x 6 x 1,7 cm
​Input Voltage: 110-240 Volt (for European and US market)​
Output: 12 Volt
Power: 50 Watts
optional: dimmable (physical switch/ dimmer)​

Thank you so much for any recommendation you might have!