Hi and welcome to SaleHoo Dav2 :)
At this point the only alternative you have is the one being suggested by Chinavasion and you're right it may make the shipping time a bit more longer since the product is being shipped twice for reaching the end customer.
Not only will this make shipping time longer but more expensive as well as you will pay for shipping to you and shipping to your customer.
Many sellers who dropship actually add a note to their listings informing them that the product is coming in from (location) and that they may incur additional charges such as import duties. You might want to consider trying this.
Hope this helps.