I agree with @puppetsock to remove the "Please find". Using "please" is polite, which is good in formal, professional communication. However, "find" is not the right verb to use.
Starting with "My contact number is (contact number here)..." is perfectly acceptable.
If you do want more of a lead-in, "Here is my contact number: (contact number here)...." is also grammatical.
If you prefer to keep the "please" somewhere, then I would recommend keeping the phrase "Please feel free to reach me at anytime." This phrase is very polite, and indicates a welcoming attitude from you, and directed to your client. Note that I added the pronoun "me". This is added, because you need to specify who is being communicated with in the grammar (even though it is obvious from other context-clues).