With a little searching on Ti and Maxims sites, there appear to be many possible candidates for power components. I found a large number of regulator chips and modules that are within the range that I need. The battery charger options are significantly lower though, not many chargers have built in MPP for solar arrays, although Ti does have a few (3) purpose built chips for that. I'll need to dig through the datasheets a bit more to ensure I can get enough output from one of them. Most of these chips are designed for smartphones, and while that is all well and good, I anticipate needing a bit more power than that, especially during transmit cycles.