Revell has a webpage on which you can vote for a model you want them to release. I have added a Merkava IV Baz and a Puma to the list and i hope you guys will vote for it too.
It's a slow page so have a little patience with it (you might need to scroll up and down a few times too). It was added on 28-2 and then you can vote by clicking on the big 'support idea' banner ( but i suggest you open the specific page in a new tab-page because if you click on the maingpage it will restart the whole process again.
http://ideas.revell.de/ideas/Puma:
http://ideas.revell.de/ideas/item/279/Merkava:
http://ideas.revell.de/ideas/item/275/