If you are looking for a traditional pitched roof frame style awning then Soplair, Clairval and Van-der-horn have all supplied this design and you should be able to pick up a nice used example for £200-£300. I think one or two other obscure imports form mainland europe have also made it over here on 2nd hand vans. Walker and isabella still make something this shape and new they are about £1200-31700, I do not know if they do a model for the Puck. Fortex and Unico make very attractive barrel shaped awnings that new are up to £1800 but second hand about £500.
All these manufacturers made awnings specifically designed for the Eriba. They are not a generic awning that fits lots of dffderent vans so there are less out there for sale.
If you want a blow up awning then the I would look for a Kampa Pop-Air 260. Clairval have also been selling a version for about a year but again I don't know if they make a model for the Puck.
If you want something that fits then you realy must buy a model specific awning.
The only other option you have is to buy a low campervan drive away awning. This usually has doors on the sides and a tunnel at the awning rail end. Some owners like these but most have problems with water pooling on the tunnel section.
Edited as I've just read the comment below. Well spotted that man.