WTB: Pentax telezoom

My 70-300 sigma just died on me, keeps giving f-- even after a good clean of the contacts, the aperture ring seems lose, anyways, Just wondering what you guys have for sale in the region of telezooms. I wont be after another sigma 70-300 as it was too soft @300. What you guys got then?

The one obvious "best buy" choice is the SMC Pentax-DA 55-300mm.

I know, I'm just seeing if anything like a sigma 150-500 or something pops up