Contacting the owner about an off-market listing?

I recently contacted a broker about his apartment listing and was told that I had to view it on that day since the owners were taking it off the market the following day to "renovate" it and now it is finally off-market. The apartment had been on the market for over a year with several price cuts and appears newly renovated so I suspect they are switching to another broker or simply taking it off the market for a while. However, I am very interested in the apartment but now have no way of seeing the apartment. Any advice about how to contact the owner or should I reach out to the broker again? Normally I wouldn't think twice about an off-market listing but I have looked at apartments in the building before and would be likely to make an offer after viewing it.