Dear Frank, sorry for the late reply. Only today I got the mail from the Forum people.
Hence this reply. Perhaps it was good, because this morning I visited the Wolfe Camera store in San Mateo California (walking distance from my house). THEY ARE HAVING A CLOSING DOWN SALE. I found the original Pentax battery D-LI50 for US $ 21 and a 1800 mAh non-genuine for $ 13. Biggest surprise, the Pentax Remote F for all Pentax cameras was $7.20.
So thanks Frank