Need mortgage dealer speed estimates from Bloomberg

I'm looking for someone who can retrieve dealer speed estimates for agency MBS from Bloomberg. The function I believe is VALL, something like FNCL35 Mtge VALL. I would do it myself but unfortunately I do not have easy access to a terminal. I would be more than happy to compensate you for your time (to the extent it does not cost me more than a Bloomberg subscription, of course). Let me know if you can help!