Converting zcall output tped and tfam files to vcf

Hi, first of all amazing project. 

Could you please advise how to convert zcall output .tped and .tfam files, in the format of A,B alleles back to vcf format in 0/1 format. I tried the plink commands with --recode vcf, but didn't work as expected. Any advise is highly appreciated. Thanks in advance!