With a 10" swing you will more than likely need an AXA or 100 series Quick Change Tool Post (QCTP). As mentioned, Aloris makes one and can be purchased through any number of vendors. Phase II also makes one for somewhat less money. The Aloris is American made, the Phase II is either Chinese or Taiwanese, I don't remember which. I have used both, and find that the Phase II in most cases will do the job without a problem.
There are two kinds of tool post in addition to the different brands: Piston type and Wedge type. The piston type has a rod or piston that pokes out from the side of the tool post and pushes the tool holder against the dovetails to tighten it up. They generally seem to be plenty solid. The wedge type is constructed in such a way that one of the dovetails can move in an angled fashion, something like a wedge. When the post is tightened up, the wedge tightens up against the dovetails of the tool holder itself, locking it in place.
Differences?? The piston type is generally a bit less expensive than the wedge type, but the wedge type is claimed to offer better repeatability and may even be a bit more solid, reducing the chance for chatter. Both types of toolpost use the same toolholders.
As I said before, I have used an Aloris, and it was wonderful. When I purchased one for my 10" Logan, I purchased a Phase II wedge type. Phase II fit into my budget much better, but I did splurge the extra ten or fifteen bucks to get the wedge type. I have no complaints, it serves me well.