One Wicket application talking with another wicket application

Earlier there was one Wicket Application with two databases say Database A and Database B. Now the problem is Database A is maintained by one client and database B is maintained by another(Say an associated child company ). Due to some problem they decided to split and the entire code was re-used by Client B which connected to only Database B and Client A connected to only Database A. Now the problem is they do not want the customer to know the split. So is there a way where one wicket application say Wicket A can extract data from another wicket application B in some way. Does wicket provide any services or provisions for this? I tried to search the entire net but was not able to find an exact answer.

The closest i got was this How can I reuse code when two different wicket applications share common functionality but it talks about re-using the code. But I do not want to re-use anything. They would run as two different application, have two different Svn resource and so on.

We are using wicket 1.5 and Spring.