Did some testing on some Loupes or options I can find in the local stores, I picked the Zacuto Z-finder, Hoodman Loupe ansd SWIVI External Monitor for testing for K-5 and K-01.
Findings:
1. Zacuto Z-finder - #1 on the list but if installed to the K-5 it interferes with the optical viewfinder especially with the Pentax magnifier, will work with the K-01 but to expensive to buy for only one Camera unit. $350 Cdn. no buy.
2. Hoodman Loupe - Available with a 3x magnifier on the Crane Kit, hotshoe unusable with crane kit, ugly kit when installed. $260 Cdn. no buy.
3. SWIVI 5" External Monitor - Good concept, will be able to save battery life of your camera coz your using external monitor, wide view. Downside is a little big for K-01 and unreliable quality, lots of complain with the product. The product we tested is brand new and its faulty already. $350 Cdn. no buy.
Gave up but as I passed by the shelves I've seen the Delkin 3' Pop up Shade, for $20 I'll give it a try. I was very satisfied upon installing it, serves the purpose - don't block 100% of sunlight but useful - I always shoot with the K-5 outdoors and this is only a backup. The sun shade also serves as a very reliable protection for the LCD when storing the camera, and also no need for extra room in your bag. SHADE IS ALSO REMOVABLE.
Saved a lot of money, I will just keep the money for a nice lens or a K-03 which has a viewfinder installed. Enjoy shooting with your K-01 and cheers.