Old versions of the reference genome and dbSNP
The UCSC Genome Browser downloads page has old human genome assembly versions way back to the first human genome ever published (by UCSC in 2000).
http://hgdownload.soe.ucsc.edu/downloads.html#human

We also have a variety of archived dbSNP data up to dbSNP141 on hg38, dbSNP 131 on hg37, dbSNP126 on hg18:
http://hgdownload.soe.ucsc.edu/goldenPath/hg38/database/snp141.txt.gz
http://hgdownload.soe.ucsc.edu/goldenPath/hg19/database/snp138.txt.gz
http://hgdownload.soe.ucsc.edu/goldenPath/hg18/database/snp126.txt.gz

They're in a custom table format, which can be turned into VCF manually.

You can also get all of this data from Table Browser and add filters, etc.:
http://genome.ucsc.edu/cgi-bin/hgTables