If you are willing to settle for Chinese girls instead of J-girls and for sumata instead of honban, you might want to try a couple of esutes. I'm not in Japan right now, so I can only point you to places where I've had good luck in the past. Trinity near Otsuka often has at least one busty girl on staff. I see from their current website info that "Cherry" should fit the bill. Also, 69 Gakubou near Warabi specializes in busty, beautiful Chinese girls. The new edition of their website is not so revealing as in the past, but if you use your imagination you can get a good idea about what you'll find there. None of these girls are in the league of the truly top-heavy Tokyo Topless girls, but rather on the busty end of the scale for the normally proportioned. You can find links to both places through the esute menu of Tokyo Pink Guide.
About a year ago I had a truly great time at Akiba Refre near Akihabara Sta. They had a couple of girls on staff who rivaled the ones on Tokyo Topless. The URL isn't working now, though, so they may have closed down.
By the way, does anyone know if Oasis near Okachimachi Sta. is still open? (It also went by the name of Two Camel at one point.) The URL isn't working.