data transfer between databases

This is probably a Postgres question but someone might be able to offer
advice on how to transfer data :)

New "reference" or read-only data gets input during development and I
want to transfer it to the production database from time to time.

I think my choices are:

1. Re-enter it manually - only if all else fails.

2. Use Django's multi-database feature and write a utility to transfer
data which doesn't already exist. Except the databases are on different
machines in different data centres.

3. Exploit some pre-existing tool written for precisely this problem.

Any suggestions?

There are currently three reference tables involved and two have m2m
relationships between themselves. The other is stand-alone.

Customer data is fine in the production database and won't be touched.
There are no relationships with the reference tables.

Thanks

Mike

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