I know there is some visa hassle involved, but if you´d invite her for lets say 10 days, you could shoot a dap with her every second day and fill in the rest with other sets. Just dress her differently and vary the locations a bit. Wiska is very popular amongst porn fans, thus all scenes should play you in a lot of money.
Of course I´d like you to release all those 5 daps immediately. But I also understand if you store some away for later this year.
Does this sound reasonable?

PS: I guess you can contact Wiska via Exbi. If not, send me a PM.