Back when Death's Head 2 was popular, Marvel did reprint selected issues of his original run as a trade.  Otherwise, Panini UK has reprinted Death's Head and Dragon's Claw among other former MarvelUK titles and they're available via AmazonUK.
psykomoko wrote:
Don't forget CLANDESTINE! (Then again, I think it did end up being published under the main Marvel banner...)
The Davis issues were collected.  It's better to forget about the ones after he left (which Davis later retconned as a dream anyway).