GE Models showed renderings of the BM-21V (9P125) MLRS 9K54 "Grad-V" conversion on the GAZ-66 chassis in 1/35 scale from Zvezda. (assembly in combat and stowed positions is possible).
This is partial text from the full article (usually with photos) at https://armorama.com/news/grad-v-on-gaz-66-chassis