Does T-Mobile still send out the older two-unit signal boosters?

I have the new LTE Cellspot but I'd probably be better-served by the old fashioned signal booster since I still have a (crappy) LTE signal indoors and would rather not use more of my capped home broadband. I also have the Cellspot Router, so maybe I could just exchange the Cellspot for the Booster without giving up the router?