Hi,
There are, indeed, things called "breeding loans" but it is a quite complicated arrangement to keep both sides happy.
You also need to consider quarantine quite seriously so it generally takes a long time either without your snake or keeping both partners. You also need to have arrangements in place to deal with sickness in either snake, who gets what number of snakes from any resulting clutch, who chooses which snake first from the hatchlings etc.
I'd have a search of some of the threads dealing with it to see what problems or experiences people have had.
**ETA** ninja'd egad!
dr del