To find SNP's in a gene sequence, i use ensmble genome browser(http://www.ensembl.org).Its a bio-informatics site,where you can easily find SNPs with FASTA (Sequence) for every specific gene.

You can use chipbioinformatics. It is very useful to find SNPs.

NCBI has several sites dbSNP, clin var and yes my fav is Chip .org Aka SNPper but it is often down.

thanks dr Vernell Williamson

Pairwise with dots for identities under alignment in BLAST gives SNPs