Thanks guys,
I think I will go for the easiest option. I have no experience in 3D modeling whatsoever, and have no complete carpentry tools at hands.
If I were to print the whole block, should I replace all four blocks to create more symmetrical friction on the axes? (since plastic is more slippery than wood.) Or the friction difference is negligible and will not affect performance. I guess not many people have the same issue, so even just an insight is appreciated.