Too small for the rectilinear lens
why is one Port not an option?
or you just mean, that the DP-100 (4") is too small?
You need the dome corresponding to the wide angle port. Say that the port is 170mm that is a section of a 230mm glass but you can't use the 170 as the fisheye would vignette so you need 230mm
If there was a compelling option it would be on the chart but not many people want to g around with such big dome port