Oh they will I assure you!
Series 3 will probably be released in the latter of next year. I haven't heard anything back from them yet as I have contacted them about it, but expect it then or at least in the summer. We may get these series more quickly because the format is easier and quicker to release.
I really hope you're right! Which series was the DIY store and lighthouse episodes? Ive got a video tape recording of 5-6 episodes, which are pure gold, although the quality of the tape has greatly diminished over the 14 or so years.