Yes they are still in business and very helpful. I am not sure you would want to be making personal calls at their call charges, but 50 dollars is money well spent if acars is broken and you need to call the company urgently.
You just call up on the listed frequency and as happened last time they suggested a better frequency and then patched me through to ops, who then completely disregarded my suggestion. The result was thousands of dollars of additional cost, but the Stockholm radio bit worked fine.