I certainly do! Let’s see if we can find a weapon that works.
First, I think a lightsaber pike would likely fit well with your character’s background with a staff. You could give her either a double or single-bladed one; the double-bladed ones are typically associated with the Jedi Temple Guards of the Old Republic, and the single-bladed ones are used by Sith and associates. That’s just historical, though, and I don’t think your character’s alignment with either side has to influence her weapon if you don’t want it to. If you went with a traditional lightsaber pike, with two blades, there might be some question as to how she got it, just because it was used pretty much exclusively by the Temple Guard. Also, the fighting style is nearly identical to that used with a double-bladed lightsaber (saberstaff). Really, the only difference between the two weapons is the length of the hilt and blades, so if you think a saberstaff would be too advanced then the double-bladed pike might not work. A single-bladed one might be used more like a lightsaber than a staff, so take that into consideration as well.
Something else you might want to look into is a force pike. They’re somewhere between a lightsaber and a staff, with a vibro-edged tip to deliver strong electric shocks. The settings can be adjusted; at the lowest, it’ll give a very painful shock, higher settings can cause paralysis or death. Turning it all the way up will let it slice through bone and thin armour. The style of fighting required by a staff, which involves a lot of stabbing motions, would fit well with this weapon. It’s also a whole lot cheaper than a lightsaber pike, if that would be an issue for your character.
And perhaps one of my personal favourites, a vibrostaff could also suit your character well. Like other vibroweapons, the vibrogenerator in the hilt causes the blade to vibrate so fast that a glancing blow could take a limb off. Most are double-bladed, but you can get single-bladed versions, and while it is a light weapon, you’re not going to get the problem where a staff-wielder has to get used to the weightlessness of a plasma blade. A lot of them also have cortosis weaves, which allow them to block blows from a lightsaber or deflect a blaster bolt. It’s not deadly in the way one would consider a saberstaff deadly, but it would definitely get the job done. It is quite long, though, with a three-foot hilt and a two and a half-foot blade, so consider if your character might be too short for it.
This has gotten long, but I also want to propose an electrostaff. If you’ve seen The Clone Wars, they’re the things that Grievous’s droid guards carry. They can block lightsaber strikes, and they have emitters on each end with different power settings, ranging from incapacitating to deadly.
So yeah. There are tons of options for you to choose from. Feel free to ask for specifics or more recommendations if you want, I could probably talk about this all day. A lot of these weapons are very similar in design and/or purpose, so consider the image you want for your character and pick something to match.
I hope that helps!
~ Jacen