Help with Umbrella insurance

[Ana Vhan]

Hi experts, I am hoping you can help me with my unique situation. We used to live in US until last year. We own a couple of properties there and now all are rented out. Since we are not in the country at the moment, we don't have an auto or a home where we have a home owners insurance policy. All homes have a landlord policy. 

I am told that to get an umbrella insurance, I need following,

1. to have a home owners comprehensive liability policy which is generally issued when you live in a home. 

2. need an auto policy

Both of these I can't get given that I am outside of the country right now. 

Any ideas on how I can still get an umbrella insurance ? Very much appreciate your help. 

Thank you!