Here's the Fender Extender DIY ( trust me guys its the best solution so far)
So here are steps.
I took this simple Plastic File which is very easily available at any stationary shop.
Designed a very simple fender extender and cut with scissors. Then gave it simple shape by heating it mildly on stove. and then in tap water to cool it down.
I had to remove my fender from bike (Very easy task just need 12 number wrench which is already included with bike tools)
I don't want to drill in my original fender so I used Depoxy Steel. again I know its not so durable but this was the only solution I could think of.
Final Result. I know its not so good solution but I tried it and trust me no more splashes on engine
Now I have to think about something about rear wheel splashes. I would appreciate some good input from you all.