If you have no Vita with <=3.60 you can use or a old backup from your own account with VHBL bubble you're out-of-luck to create one atm. You can only use them on 3.61, but not create.
Get a <=3.60 Vita or a trustworthy person with such a Vita and give this person your PSN login data to create a bubble for you.
Maybe someone finds a way on 3.61, but everyone is working on 3.60 atm (the fw version which allows HENkaku), therefore I wouldn't hold by breath for that.