A number of parts are sold on Aliexpress, for example, in the Leduo store. In stock there are modified beams (analogues of Lego 2391/73507) in sizes from 3 to 9, as well as beams with pins at the ends in lengths from 2 to 9. The remaining parts are either direct analogues or, most often, are easily replaced. Specific design elements are most often not available, but I do not encourage their use - this goes beyond the scope of the “Lego Technic” concept - if you want to get as close as possible to the appearance, then do modeling (Revell, Italeri, etc.).
Cada added instructions for the new all-terrain vehicle C62006 Wild Cat. As soon as I receive the specific parts, I will try to assemble it - a simple (652 parts), but interesting model.