There are still alot of the CZ on the market cheap and they are the best of the Mausers available today at any kind of a reasonable price.
probably is right... Cheaper just to build from a commercial offering...
But I know that emotionally, sometimes there's something to be said for building what you want...
However, I'd say the chezch can be found reasonable enough... Mine is based on a VZ-24... And after a barrel, turning the bolt (actually just cut it off and had another one from brownells put on), the trueing the action, the stock, the trigger... milling the triggerguard... drilling and tapping a scope mount, picking up an aftermarket stock... potentially ending up with a piece of junk if something isn't done right... its not just a sporterized mauser/truck gun... its a (semi)customized mauser!!!
I went with a short action round and that is my only thing I would have done differently!!! feeds well when really working the bolt... but slowly feeding a round into the chamber after I pull my rifle up into the stand... doesn't work so well... Go with a long action round in a long action receiver... For that case I would try to just pick a receiver, bolt, and bottom steel up at a gun show...
However, I love my rifle as it shoots well, and everything is as I wished it to be... Would've been about the same as picking up a decent bolt action at a gun shop... but my rifle was built as I wanted it- not with a trigger decided on by the legal team, a barrel that was settled upon by the design team and the bean counters... and it brought back the experiences of my youth and a rifle owned by my buddy's father based on a german mauser, that I dearly covetted...

and nothing else would bring that feeling of my youth back....