I have the latest issue of the kit like you, so I went into the stash & checked. the I-beams (Parts 29 & 30) were in my kit. They were on a separate sprue in the big bag (if that makes any sense), so they should be in your kit. If you can't find them, I'd contact Round2 to see if you can get replacement parts; or you can ask in the "Wanted" section if someone has them & didn't use them when they built the Compact City Van version. Good luck.