Sorry you took the time to post, but had to wait a week to get a response.

Take a trip to partsexpress.com and check out their prebuilt crossovers. Without the capability to measure the capabilities of your speakers, the best thing you can do is play it safe and get something that is a known quantity.

The most important part in repackaging your drivers is making sure you don't blow out the tweeter by sending frequencies too low for it to tolerate. That being said look for crossover points of about 2000-2500 hz.

Good luck!