CISSP experience Question

I have passed the CISSP examination 19 months ago. I believe that now have the 
required security experience but not 100% sure because some of my work was 
security related but mixed with other duties such as system and network 
administration. 

I estimated my pure security experience to now be accurate, but how and with 
who should I confirm before applying the endorsement form to (ISC)2?

My second question is: I prefer to apply my endorsement through a certified 
CISSP, but I currently do not know any. I also will start a new job and my 
employer does not know me that much at all to endorse me. Should any CISSP know 
me for a certain amount of time before endorsing me, or can any CISSP that I 
could contact through the internet do so as long as they think my experience is 
enough through examining my CV? 

Any suggestions are appreciated. thanks