I am on academia.edu
and I think I've found what you want. It's a French academic journal called Valland with an article that has a picture of a Merovingian saddle, but not an entire article concentrated on saddles, correct? The journal is really cool even if you don't read French.
I've downloaded the issue as a .pdf file. It's 2.8 megs. Where would you like me to send it?
Living the Dream in Calontir,
Lady Dulcibella de Chateaurien
Shire of Calanais Nuadh