LPG Garages In The North East and Scotland

Not sure that this is the right place to post this but any help appreciated.

We will shortly be making a trip north from our base in North Yorkshire.  We are going to the borders area (near Kelso) and then on up to Aberdeenshire.

Our car runs on dual fuel - LPG and Petrol but obviously LPG is much, much cheaper. 

Any other LPG drivers - what is the availability of LPG around these areas please?  Especially on the leg from Kelso to Aberdeen?

Any suggestions or knowledge of filling stations who supply LPG? 

Thanks,