Welcome to the boards, JoChn! May adventure in the Gael Serran bring you fame, fortune, and frolic [img]graemlins/hehe.gif[/img]
Now, for your question.... first off, you *should* be able to buy the flasks back. You'll have to go to the right shop (wherever you sold them), and they should be in the shopkeeper's inventory. You may have to check all the guilds, and perhaps in both towns (Ishad N'ha and Valeia), but you should be able to buy them back.
Otherwise, it may be time for a little hacking...

Wyvern, the moderator of these boards, has been known to hack an item or two, and she posted directions on doing it a while back. They may be in the Best Tips thread at the top of the screen.
And don't worry about your English. It's far better than my Polish (which I know, from experience...

). We're a friendly bunch around here, and welcome everybody.