Hi. Yep, I was a Prempak C lady for several years and was gutted when they discontinued it. I've tried several different hrt preparations and regimes over the last year, including Tibolone, but none have been a good replacement for me. I did really want to find a bio identical one because I'm in my early 60s now but this week I've began taking Premarin as it's supposed to be similar to Prempak. I'm taking Utrogestan alongside the Premarin. This is only my 5th day so too early to tell if it's going to work but not feeling too bad at the moment.
I'd definitely give Tibolone a go because although it didn't work for me, everyone's different and it could well be the one for you.
Good luck and let us know how you get on.
Rosie63x