If I were you, I would contact B of A or Wells Fargo and see if they can combine the two loans. It doesn't cost much to find out and well worth it. I don't think getting another second is possible.
Dave Tap Tapper
There is another tack worth considering, although it does not address your question specifically. Consider getting your loans modified. You may qualify for payment reduction if you can make a legitimate case for hardship. As a result, you'll have extra cash available to pay off your credit card balances at a faster rate.
Most banks that offer HELOCs at 85% CLTV
SO, considering your value hasn't gone down and it's at $599,000; 85% is $509,500 minus your 1st of $417,000 and your second of $92,000 your at 85% CLTV and wont be able to get a HELOC. Sorry to be the bearer of bad news.