It sounds like you want something like this...
https://www.amazon.com/SIMBR-Universal-Tabletop-Pedestal-Adjustment/dp/B073TRK86K/ref=sr_1_3?s=electronics&ie=UTF8&qid=1515003306&sr=1-3&keywords=tilting+tv+table+mount
But, I'm guessing that you need it to go higher than it was designed for.
If you are just renting and leaving soon, then I would stick with the speaker you have until you are in the new space or I would go buy some tools and build something to support a standard tilting wall mount.
The biggest issue I see is that you are going from a traditional center channel which is just 7" tall to a speaker which is 16" tall. That really puts the entire setup in an awkward situation from what I can tell and it's not traditional enough for manufacturers to make a product for your needs really.
I looked at both floor stands and table stands and the options are few.
I could probably build something in a day of work which would do the same thing using steel pipe from Home Depot. Probably $100 or less to build something, then spray paint it to the color you want.