If you end up switching to Route 53, Namecheap support can give you a Zone file (http://en.wikipedia.org/wiki/Zone_file) to upload into Route 53. They're not exactly the same format; here's a GIST of the script I used to convert them the last time Namecheap was having DNS issues: https://gist.github.com/scpike/a72a748126cbb4359c03