i think they can probably manufacture most of it. i speculate it's re-engineered from the design of these. except redesigned probably to account for not having titanium or other advanced aircraft alloys available, and to use a solid fuel second stage instead of a liquid fuel one- since obviously liquid fuel would be dangerous for the yeminis to work with since they are getting bombed all the time. plus solid fuel is quicker to deploy since the missile is already fueled and ready to go.  it also has similar specs, 2000+ km range, mach 16 terminal speed (vs. mach 15 of the iranian version) and i think they just repurpose the rocket booster from some existing long range missile they have in their inventory. i can't remember what they are called, but they fired one at eilat at the start of the war but it got intercepted.
Canada