EdFarmer said:

...I guess this could eventually turn into a source to create a font, which could then be used for the alien subtitles...

I would be very interested in this angle, but I'd like to add a request that, if possible, we do a "complete" font and not just the letters we are able to sample from the sources.

For example, if you determine that the best match is TradeGothic LT Bold, but squeezed/stretched a certain degree and with a certain thickness, you could use a bulk-adjusted TradeGothic for all of the letters we don't have samples for, and only truly recreate the ones we do have samples for.

The lack of an accurate out-of-the-box subtitle font has certainly been a pain in my ass.