All 18 maps from http://www.ctclan.us/forum2/viewforum.php?f=57 are present in this collection

Maps included in this map pack are
BR-CTC-AP_Arena
BR-CTC-Arcade
BR-CTC-CelestialCourt
BR-CTC-Darkscape
BR-CTC-Diecontamination
BR-CTC-Encounter
BR-CTC-Nartus
BR-CTC-OnHigh
BR-CTC-Pipedown
BR-CTC-RoyalTomb
BR-CTC-SalChichanitza
BR-CTC-Sangrena
BR-CTC-Senjou
BR-CTC-SunStation19Delta
BR-CTC-TempleOfSnefru
BR-CTC-Thorndustrial
BR-CTC-Thorns
BR-CTC-WristburnStation

Maps with the prefix CTC are uploaded/created by user CTC-JimRimya

There is in fact an official Bombing Run Map Pack from the Carpal Tunnel Clan, but it only includes six of the maps. (uploaded 2006)

https://forums.epicgames.com/unreal-tournament-2003-2004/user-maps-mods/full-releases/111833-ctc-bombing-run-mappak-1?p=1688255
(no working download links)

https://www.utzone.de/forum/downloads.php?do=file&id=2298_CTC-Bombing-Run-Map-Pak-1
(download link)

Compilation and readme file by BlueSynth. I deserve no credit for the maps.