The MQ136 will work with this part (the pinouts are identical
https://forum.fritzing.org/t/mq-4-sensor-part/6035/9fritzing part ch340
The (or at least a) ch340 chip is available here (from a google search for “fritzing part ch340”
if you need a different package one can be made from the generic IC. The MiCS-VZ-89TE needs a new part which will be up in a while.
Peter