WTB: Pentax lenses, K5 battery, circular polarizing filter, gorillapod/ultrapod etc.

I am looking for a K5 battery, an ultralight and compact Gorillapod/Ultrapod/Tripod and a Pentax prime lens. A high quality circular polarizing filter would be nice as well.

The lens will accompany my K5 and 18-135WR on a round the world trip. Therefore, the lens should be cheap (and / or a very good deal), compact, capable of performing in low light, and naturally it should also boast significantly better IQ than my only existing lens, the 18-135WR.

Here are some examples:

SMC Pentax-FA 35mm F2 AL
SMC Pentax-DA 35mm F2.4 AL
SMC Pentax-DA 35mm F2.8 Limited Macro
SMC Pentax-DA 40mm F2.8 Limited
SMC Pentax-FA 43mm F1,9 Limited
SMC Pentax FA/F/(A) 50mm F1.4/1.7/(1.2)
Pentax DA 70mm 2.4 limited

I will gladly listen to advice from more englightened Pentaxians than me (so basically from anyone) regarding the optimal choice of lens.

Furthermore, I will absolutely need the item(s) to be delivered to Helsinki Finland by 11 August at the latest since I will embark on the journey on the 12th. Hence the item has to be located in Europe and an express delivery option must be available. (Alternatively I can pick the item up from Cape Town, Swakopmund, Windhoek, Johannesburg, Sao Paulo or Rio De Janeiro within the next couple of months.)

Please contact me via pm.

Kind regards
-Juho

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