If you have a CZ452 and are looking for a more "traditional" type of sling to use, here is one I found recently at a gunshow, which I hadnt seen before but when I seen it, I thought to myself this would work perfect for my cz..
I think I gave $15 or so and it was brand new.
Keep an eye out at the next show you go to in the areas that sell surplus parts etc.

Do a web search for "austrailian enfield sling" or

You will find pictures like this


Here is mine