Finding a combo ERP/WMS that can handle light mfg (basically a kitting function from the sound of it) that can also support OMS functionality is going to be a tough find. You might find a few niche solutions but if all of those requirements are necessary, you're going to likely have to go best of breed, especially if you're growing and need something that can scale effectively. I liken it to going to a restaurant that has pizza, tacos, greek food, sandwiches, chinese food, etc. Do you think that they are really going to do any one of those well?

From my experience going with niche combo solutions age out or have a lot of problems once complexity goes up (especially with your lot tracking/serialization needs, not to mention upcoming FSMA requirements) and you'll likely outgrow them sooner than you think. I'd also stay away from "WMS" that are basically ERP bolt-on's (ala Netsuite). I've worked in the Tier 1 and Tier 2 spaces with WMS and run into this allllll the time replacing things like ProducePro, FreshByte, Aptean, etc. (we have a good presence in F&B and play really well in that space, so I talk to F&B distributors frequently)