have you asked your credit card companies to raise your credit limit? do you have anyone else with high enough credit limit to put in on their card and who trusts you? your parents, siblings, your hubby's parents, siblings, etc.
Also, did you look at AA credit card?
https://www.aa.com/apps/netSAAver/Vi...omotionContent
the have intro offer - 6 months no interest. looks like it will work for you, but i have no idea if it's for US residents only.