It's not my neck of the woods but Ivriya in Givat Shmuel is well known to be a really nice mikvah and spa. It says on the site that it is under the supervision of Chabad (Rav Landau) too so I assume that implies bor al gabei bor.
In any case you can call them or e-mail:
http://www.ivria.co.il/en/mikveh.php
