Upgrade Kit for Xcarve with Ball Screws?

Hello, I’ve had my Xcarve for many years and have loved it. However the accuracy isn’t great and I’d like to upgrade it to ball screws. Are there any good kits to do this? I see the CNC4Newbies but after all the upgrades it’s around $2.2k, which at that point I feel like I might as well get a Onefinity. Is there any other options?