sometime relatively soon ill be making a simple mod that replaces Deep Ones with Tasoths from tftd. It'd just be cosmetic but there would be a (harder) version that would also upgrade their stats too (eg, 125 health, high reflexes, good TUs)
edit - maybe of little use but the assets converted to ufo/pirates palette, until I jimmy them together as a mod, also the die sound effect (in 11khz x 8bit format).
edit - mod available, in two flavors
simple change, and harder mode
mod does not have any reserved space restrictions
it does not have paper dolls, and it has a quirk likely to do with double handed item carrying which makes his arm stick out