Griffen needs help!

Hi my name is Griffen, I’m a 3 year old pittie and we don’t talk about this very much because it hurts my parents hearts and makes them cry a lot, but last summer i was having a little too much fun at doggy daycare and had an episode that’s very hard to describe other than terrifying, I passed out and my mom thought she had lost me. It was at this point that I was diagnosed with aortic stenosis, I will attach a web link for those of you that are curious as to what that is https://m.petmd.com/dog/conditions/cardiovascular/c_dg_aortic_stenosis?page=1. I recently had another echocardiogram at the vet on Monday the 26th and my mom unfortunately got some more bad news, the medication seem to be helping a bit and keeping me stable but I’m not getting much better and they said on average dogs won’t live past 4 with my prognosis. I’m really sad about this because I’m already 3 and this means I could potentially have a year left to live. My parents want the very best for me and want to consult the cardiologist to see if there’s anything else they could be doing to prolong my life but unfortunately my appointments are expensive and my last appointment used up most of their savings and the specialist could cost anywhere from $300-700 and i need another echocardiogram in about 6 months. Were hoping in sharing our story that our family, freinds, and fellow dog lovers can help in any way possible. Any amount is greatly appreciated!
https://m.petmd.com/dog/conditions/cardiovascular/c_dg_aortic_stenosis?page=1