I got My H1b Petition approved in 2013 (not stamped) with my x company

Hi ,

I got My H1b Petition approved in 2013 (not stamped) with my x company, it is expired in 2014 Oct. Also i dont know petiton no.
Can you please suggest me what are the options i have if i want to renew it ? If it is possible then how much will it cost?

Thanks,

Azam