Yes they do come up from time to time and its worth keeping an eye open so you can don your rose tinted specs n travel down memory lane!
I'm not sure if there is a modern day silhouette pellet? I doubt its quite the same profile and weight though. You would think that if the dies/ moulds or whatever were well made then they could still be made or copied. I recall them being heavy but as I shot the manly calibre back in those days I had no call for them.
I own a .22 rws 45 great springer strong reliable and accurate cant fault the one I have.
Dave.