Try the Pentax Tak 50mm macro. It can be had for a song, less than $50 if you are lucky.
You will need to focus by hand for close-ups. No autofocus is not a detriment.
This site's lens review pages rate this a perfect 10! That is hIgher than the DA35 or the FA35. It also rates higher on aberrations than either.
Having a larger focal length, it will give you greater working distance at the same magnification ratio as a 35mm lens. That greater distance gives more room for lighting and setup. The camera and lens will block less of the light. As I recall, 1:1 reproduction is at a working distance of as a bit OVER six inches.
Some versions can go to 1:1. The SMC version only goes 2:1 because it contains the special linkages that are used only by the Spotmatic F. It costs a couple of dollars more than the non-SMC version. By a couple of dollars, I mean a couple of dollars
Either version can be used on your camera. Reproduction scales are engraved on the metal body.
It is sharper, has less aberrations, and is very inexpensive. If you don't like it not much money is lost if you put it on a shelf. With resale, the "new to used" depreciation has already passed. You can sell it for the price you bought it at, maybe higher. I like it so much I bought two. The SMC for my Spotmatic F and the 1:1 model for all my other cameras. This lens is probably the best bargin of ANY lens made by Pentax.
p.s. I have the FA35 also. I don't use it for close-up photography.