You can use a regular jet and use oversize leathers. You will have to special order the leathers. You can also put spacers under the leathers or put regular leathers inside the over-size leathers to make them beefier.
I did a search a while back for 2.5" stuff. Most of it is no longer being made. What came out of the well? Was it a regular packer? Why can't you re-use it?
Also beware that only 3" casing adapters are being made now, so you will have to either swedge up or down for the well head. I prefer to go up so you can install everything and remove everything without having to work an adapter around the pipe. 3" casing adapters have 1.5" threads so you will need to get another special adapter to go back to either 1" or 1.25" threads. Let me know if you need any more help, very few people know about 2.5" wells anymore.