Im really sorry to hear about your predicament. Do you know what triggered the sz? Perhaps if you could work that out and then exclude it from your skiiing you would be ok? 3 sz's in your whole life and 1 in the last 17 years! Thats a great track record. I think it would be wise to start on the intermediate slopes and work your way up. That way, if any part of your skiiing is a trigger, then you will find out about it before your hurtling through the air at 300mph! I cant claim to have skiied myself but would love to try it. (The lack of money and/or passport are a problem atm!) I wouldnt have thought epilepsy would have been a problem. Have you talked to travel agents? The ones that offer insurance should be able to tell you whether you can or not. (Although no doubt, travel insurance would be higher as skiiing is such a dangerous sport)
I hope you get on the slopes soon
Everyone has a guardian angel. They help pick you up when you fall, comfort you through your times of need and help you appreciate the times when things are going well.