I finally decided to upgrade to a VAZ chassis, and I'd like to share the details of this process, the article I followed during the conversion:
https://www.drive2.ru/l/3130140/
The cost of the adapters isn't listed in the expenses column (I had a friend who does carpentry do it for a bottle of whiskey). I've seen kits online for $100. Given that price, the conversion would have cost $400 (but keep in mind that the chassis is in good condition, with new brake discs, pads, cylinders, and bearings). Therefore, it's best to upgrade when the chassis needs repair.