I'm interested too but the magizine would be the tricky part if you ask me.
The follower and the lips are set up for 223 and not the 30 Remington case that is the parent case to 6.8.
It may be easier to go with 7mm TCU or make a .270-223 or call it 6.8X45 round and use the parent 223 case with deer capable bullets.
The 7.62X39 version magizine may work but I am not sure.
I found it odd that when CZ had their poll about what calibers we would like to see in the 527 platform 6.8 was not mentioned leaning me to think that the Mag or the action would not work for one reason or another. Go on thier website
www.cz-usa.com and see if they still have the poll and two they have a custom rifle program that you can see if they will do the work or reccomend someone that can or if you can order a new rifle in that caliber under the custom rifle program.
I would love to see the 527 in 35 Remington as a brush rifle and as a youth deer gun. But looking at the over all lenghts of the 223 and the 7.62X39 I think 35 rem is a little too long. I know take my own advice and see if they can do it.
Too many projects and wants ahead of a 35 rem right now.