There are lots of pseudo macro options, like the Tamron 70-200 or any 70-300. The 16-85 and 18-135 are both pseudo macros at about 1:4. But my guess is, you want a lens that doesn't exist, in a Pentax mount. Time to move on. Obviously, since the Pentax 200 macros are older, if you thought that was a solution (like the FA*200 ƒ4 macro) you would have gone for it.
"Buy the lens you love, buy the body it goes on."
Pentax has clearly decided they can't afford to support the 200 ƒ4 macro crowd. They did give it a try though.
---------- Post added 07-13-16 at 03:21 PM ----------
Originally posted by Digitalis Sigma is playing fast and casual with the term "Macro" with that lens.
The Pentax 16-85 provides more macro capability than the 70-300 that Sigma calls a macro. But clearly not a macro by Pentax standards. But since when do Sigma ever care about Pentax standards?