Actually David Boddington sold DB Sport & Scale back in the 1980's when he became editor of Radio Modeller. Then he was editor of RCME then Aviation Modeller Int then RCModel Flyer Scale Aircraft Quarterly, Flying Scale Models. Some of his plans are in the plan service of each of these magazines.
RCME, Radio Modeller, Scale Aircraft, X List Plans etc are now MYHobbyStores.co.uk
AMI, Model Flyer, Flying Scale Models, Aeromodeller are now ( this months news ) all one publisher (ADH Publishing ) so all the plans will come from them. Big news from ADH this week is that they are bringing back Aeromodeller and a new RC Electric Flight magazine later in the year.
DB Sport & Scale still sell their own range of kits & plans this is a link to their page about 'Boddo'
http://www.dbsportandscale.com/40_years_on.htm
RCM plans have 2 of his designs - Mighty Barnstormer and Ghost Rider RCMplans.com
So if you want to know where any particular plan is ask and maybe we can tell you who sells it. I reckon all of the great 'Boddo' s plans are still available somewhere in the above sources.