Sakoluvr,
Don't give up. I thought I'd lost one of my good binoculars this summer, but found them again after about three months--right in the door where I'd stashed them in a hurry, and then forgotten about it.
There are some excellent binoculars out there for $500 or less these days, as good as anything available for $800-$1000 a decade ago. You might consider one of those, and then if your Pentax reappears you'll have a backup.
I found em! When my son got his bear a few weeks ago I had em on and removed them when it came time to get the bear out of the woods. I swore I left them at the site of the kill, but could not find them despite going back to look 2x.
Stashed them in a pack back at the cabin, and found them today. Joy!