I had a stash some old crowns that has a cork seal that I got from my dads old supplies, they worked great, but I have not been able to find them anyplace in the last 20 years, all gone to plastic.
I now use wind bottles and a hand corker (remember to soak your corks). I think of Mead as honey wine, it needs time to age. Primary for standard fermentation, secondary for about 2 months, then into a third for about another 8 months, then into a corked bottle for another year (store on the side to keep the cork wet), then it is good to drink if you like them young. No substitute for time and only one way to get it.