Hi Adrian and welcome to Eribafolk 
There is quite a difference between a Puck and a Puck L. Both are equally as desirable over and above their small size and therefore their ability to fit into narrow spaces but the Puck L does have a large interior space advantage over the Puck. However the Puck L was only produced for approx. 15 years between 1995 and 2010 so there are fewer of them around.
If age isn't a worry for you there's a 1982 Puck for sale on our Facebook Group Page at the moment. The seller wants £5000 for her and will take no offers. They live south of Birmingham. Looking at the pictures, it does look as though it's been well mainatined and improved. I can give you more details if you require.
Randa