where can i buy/ or what else i can use as replacement?

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Breath out slowly along the way, you breath in the moment you clear out all the reserve air in your body.

It depends on personal preferences, some people train to reduce interval of breathing (since it causes delay) by only exchange breathe when they need to.
Other people like you are more pace oriented to improve efficiency in the pool, for your case I would suggest to keep your breathing in every 3 strokes but try to balance out your breathing. So breath out along the way and by the time you finish your 3rd stroke you are ready to breath in again. If you still have some reserve air in your body just force it out quickly and get ready for the next interval.

You can try youtube method below to practice your breathing. Just do it slowly & relax. Thanks brother Vincentccw show me how to put youtube video here.

Sorry, brother. I still don't know how to do that. By the way, below is the original link:   

https://www.youtube.com/watch?v=cM03tajpkVk

Yes, it is from TI taiwan. I'm learning it too. Took me 7 months, from don't know how to swim freestyle until now can swim 200m. Still the noob.   

Bro, it is hard to give suggestions without video. But usually both arms not symmetrical is because of one side breathing, you can do practice on bilaterally breathing.

For body not streamlined, you can practice on skating drills. Do it left hand then right hand. You can refer from YouTube below:

Can try turn your your body instead of just lifting up your head ?

Ya, that is very short time to breath but if you can turn (not lift) your head higher then you have enough time to breath

You have to thanks to johny2k, he is the one who share the video. Cheers 

Yes, brother. You can use this skate drill as a breathing drill, but not easy to done it. Before breathing must check 3 things - Head, Neck, Spine, make sure it is enough relax & in one line. If you can practice more on this point, I'm sure it will help you breathing more easily.  :thumbsup: