Dlask sells kits for 199$ with all the important parts you could need.
Also just noticed you said a CSA model.... Its a common gun with lots of support from CSA. Getting parts is zero issues, so a parts kit is not really a urgent need for anyone... They replaced all my internals after I complained for free and sent me a 140$ scope mount for my troubles. Ofcourse not every one probably knows this and may go look for parts kit to avoid imaginary issues.
If you had the CZ one thats posted in the pics above, 400$ is what they sell for.