First off, welcome to the Alembic Club! If you've found a set of Series I pickups, you'll be needing more to get it up and running and there are a few complications we should discuss before you cut up another bass - we would want to help you make sure you're making a good choice. So tell us about your project and you'll no doubt lots of opinions chiming in.
As for a routing template, we could make you one, but it's not a normal item we offer. There are several shapes for Series I pickups, so we would need more details to make sure you got the correct one, it really might be most practical to fashion one yourself using the pickups you have.